Quelle  date.cbl   Sprache: Cobol

       IDENTIFICATION DIVISION.
      *
       PROGRAM-ID.    DATET.
      *
       DATE-WRITTEN.  04/10/89.
      *
      *    MODIFIED   12/26/95.
      *               07/31/97.
      *               10/18/97.
      *
      *        *******************************
      *        *                             *
      *        *     Judson D. McClendon     *
      *        *     Sun Valley Systems      *
      *        *     329 37th Court N.E.     *
      *        *     Birmingham, AL 35215    *
      *        *        205-853-8440         *
      *        *                             *
      *        *******************************
      *
       ENVIRONMENT DIVISION.
      *
       CONFIGURATION SECTION.
      *
       INPUT-OUTPUT SECTION.
      *
       FILE-CONTROL.
      *
       I-O-CONTROL.
      *
       DATA DIVISION.
      *
       FILE SECTION.
      *
       WORKING-STORAGE SECTION.
      *
      ******************************************************************
      *                                                                *
      *                             7 7 ' S                            *
      *                                                                *
      ******************************************************************
      *
       77  WS-ANSWER                   PIC  X(01)          VALUE SPACE.
       77  WS-ESCAPE-FLAG              PIC  9(01)           VALUE 0.
      *
      ******************************************************************
      *                                                                *
      *                 S C R E E N   H O L D   A R E A                *
      *                                                                *
      ******************************************************************
      *
       01  SCREEN-HOLD-AREA.
           03  SH-EDIT-DATE            PIC  X(08)  VALUE SPACES.
      *
           03  SH-WORK-MMDDYYYY        PIC  9(08)  VALUE 0.
           03  SH-WORK-MMDDYYYY-ALPHA  REDEFINES SH-WORK-MMDDYYYY.
               05  SH-WORK-MONTH           PIC  9(02).
               05  SH-WORK-DAY             PIC  9(02).
               05  SH-WORK-YEAR            PIC  9(04).
      *
           03  SH-WORK-YYYYMMDD        PIC  9(08)  VALUE 0.
           03  SH-WORK-YYYYMMDD-ALPHA  REDEFINES SH-WORK-YYYYMMDD.
               05  SH-WORK-YYYY            PIC  9(04).
               05  SH-WORK-MM              PIC  9(02).
               05  SH-WORK-DD              PIC  9(02).
      *
           03  SH-JUL-DATE             PIC  9(07)  VALUE 0.
           03  SH-JUL-DATE-ALPHA       REDEFINES SH-JUL-DATE.
               05  SH-JUL-YYYY             PIC  9(04).
               05  SH-JUL-DDD              PIC  9(03).
      *
           03  SH-BEG-YYYYMMDD         PIC  9(08)  VALUE 0.
           03  SH-BEG-YYYYMMDD-ALPHA   REDEFINES SH-BEG-YYYYMMDD.
               05  SH-BEG-YYYY             PIC  9(04).
               05  SH-BEG-MM               PIC  9(02).
               05  SH-BEG-DD               PIC  9(02).
      *
           03  SH-END-YYYYMMDD         PIC  9(08)  VALUE 0.
           03  SH-END-YYYYMMDD-ALPHA   REDEFINES SH-END-YYYYMMDD.
               05  SH-END-YYYY             PIC  9(04).
               05  SH-END-MM               PIC  9(02).
               05  SH-END-DD               PIC  9(02).
      *
           03  SH-OFFSET               PIC S9(08)  VALUE 0.
           03  SH-AGE-YEARS            PIC  9(04)  VALUE 0.
           03  SH-AGE-MONTHS           PIC  9(02)  VALUE 0.
           03  SH-AGE-DAYS             PIC  9(02)  VALUE 0.
           03  SH-AGE-TOTDAYS          PIC  9(08)  VALUE 0.
      *
           03  SH-YEARS                PIC S9(07)  VALUE 0.
           03  SH-MONTHS               PIC S9(07)  VALUE 0.
           03  SH-DAYS                 PIC S9(07)  VALUE 0.
      *
           03  SH-RESULT               PIC  X(20)  VALUE SPACES.
      *
      ******************************************************************
      *                                                                *
      *                 D A T E   W O R K   A R E A                    *
      *                                                                *
      ******************************************************************
      *
       01  DATE-WORK-AREA.
           03  DW-DATE-ERROR-FLAG          PIC  9(01).
      *
      *
      *  ** TODAYS DATE **
      *
           03  DW-TODAYS-DATE              PIC  9(08).
           03  DW-TODAYS-DATE-ALPHA        REDEFINES DW-TODAYS-DATE.
               05  DW-TODAYS-MONTH             PIC  9(02).
               05  DW-TODAYS-DAY               PIC  9(02).
               05  DW-TODAYS-YEAR              PIC  9(04).
      *
           03  DW-TODAYS-YYYYMMDD          PIC  9(08).
           03  DW-TODAYS-YYYYMMDD-ALPHA   REDEFINES DW-TODAYS-YYYYMMDD.
               05  DW-TODAYS-YYYY              PIC  9(04).
               05  DW-TODAYS-YYYY-R           REDEFINES DW-TODAYS-YYYY.
                   07  DW-TODAYS-CC                PIC  9(02).
                   07  DW-TODAYS-YY                PIC  9(02).
               05  DW-TODAYS-MM                PIC  9(02).
               05  DW-TODAYS-DD                PIC  9(02).
      *
      *
      *  ** DATE WORK AREA **
      *
           03  DW-WORK-DATE                PIC  9(08).
           03  DW-WORK-DATE-ALPHA          REDEFINES DW-WORK-DATE.
               05  DW-WORK-MONTH               PIC  9(02).
               05  DW-WORK-DAY                 PIC  9(02).
               05  DW-WORK-YEAR                PIC  9(04).
      *
           03  DW-WORK-YYYYMMDD            PIC  9(08).
           03  DW-WORK-YYYYMMDD-ALPHA      REDEFINES DW-WORK-YYYYMMDD.
               05  DW-WORK-YYYY                PIC  9(04).
               05  DW-WORK-YYYY-R              REDEFINES DW-WORK-YYYY.
                   07  DW-WORK-CC                  PIC  9(02).
                   07  DW-WORK-YY                  PIC  9(02).
               05  DW-WORK-MM                  PIC  9(02).
               05  DW-WORK-DD                  PIC  9(02).
      *
      *
      *  ** SHORT MMDDYY DATE **
      *
           03  DW-SHORT-DATE               PIC  9(06).
           03  DW-SHORT-DATE-ALPHA         REDEFINES DW-SHORT-DATE.
               05  DW-SHORT-MONTH              PIC  9(02).
               05  DW-SHORT-DAY                PIC  9(02).
               05  DW-SHORT-YEAR               PIC  9(02).
      *
      *
      *  ** OFFSET DATE AREAS **
      *
           03  DW-OFFSET                   PIC S9(08).
      *
           03  DW-OFFSET-UNSIGNED          PIC  9(08).
           03  DW-OFFSET-UNSIGNED-ALPHA   REDEFINES DW-OFFSET-UNSIGNED.
               05  DW-OFFSET-YYYY              PIC  9(04).
               05  DW-OFFSET-MM                PIC  9(02).
               05  DW-OFFSET-DD                PIC  9(02).
      *
      *
      *  ** JULIAN DATE **
      *
           03  DW-JUL-DATE                 PIC  9(07).
           03  DW-JUL-DATE-ALPHA           REDEFINES DW-JUL-DATE.
               05  DW-JUL-YYYY                 PIC  9(04).
               05  DW-JUL-YYYY-R               REDEFINES DW-JUL-YYYY.
                   07  DW-JUL-CC                   PIC  9(02).
                   07  DW-JUL-YY                   PIC  9(02).
               05  DW-JUL-DDD                  PIC  9(03).
      *
      *
      *  ** BEGIN DATE **
      *
           03  DW-BEG-YYYYMMDD             PIC  9(08).
           03  DW-BEG-YYYYMMDD-ALPHA       REDEFINES DW-BEG-YYYYMMDD.
               05  DW-BEG-YYYY                 PIC  9(04).
               05  DW-BEG-YYYY-R               REDEFINES DW-BEG-YYYY.
                   07  DW-BEG-CC                   PIC  9(02).
                   07  DW-BEG-YY                   PIC  9(02).
               05  DW-BEG-MM                   PIC  9(02).
               05  DW-BEG-DD                   PIC  9(02).
      *
      *
      *  ** END DATE **
      *
           03  DW-END-YYYYMMDD             PIC  9(08).
           03  DW-END-YYYYMMDD-ALPHA       REDEFINES DW-END-YYYYMMDD.
               05  DW-END-YYYY                 PIC  9(04).
               05  DW-END-YYYY-R               REDEFINES DW-END-YYYY.
                   07  DW-END-CC                   PIC  9(02).
                   07  DW-END-YY                   PIC  9(02).
               05  DW-END-MM                   PIC  9(02).
               05  DW-END-DD                   PIC  9(02).
      *
      *
      *  ** RESULTS OF AGE COMPUTATION **
      *
           03  DW-AGE-YEARS                PIC  9(04).
           03  DW-AGE-MONTHS               PIC  9(02).
           03  DW-AGE-DAYS                 PIC  9(02).
           03  DW-AGE-TOTDAYS              PIC  9(08).
      *
      *
      *  ** INPUT/OUTPUT VARIABLES **
      *
           03  DW-YEARS                    PIC S9(07).
           03  DW-MONTHS                   PIC S9(07).
           03  DW-DAYS                     PIC S9(07).
           03  DW-WEEKDAY                  PIC  9(01).
      *
      *
      *  ** SCRATCH WORK AREAS FOR DATE ROUTINES   **
      *  ** (ASSUME MODIFIED BY ALL DATE ROUTINES) **
      *
           03  DW-WORK1                    PIC S9(09).
           03  DW-WORK2                    PIC S9(09).
           03  DW-WORK3                    PIC S9(09).
           03  DW-TEMP-YYYY                PIC S9(09).
           03  DW-TEMP-MM                  PIC S9(09).
      *
      *
      *  ** NUMBER OF DAYS IN EACH MONTH                     **
      *  ** (DAYS IN FEBRUARY ARE ADJUSTED BY DATE ROUTINES) **
      *
           03  DW-DAYS-IN-MONTHS   VALUE "312831303130313130313031".
               05  DW-DAYS-IN-MONTH        OCCURS 12 TIMES
                                               PIC  9(02).
      *
      *
      *  ** HOLIDAY TABLE **
      *
      *  ** THIS TABLE CONTAINS EVERY HOLIDAY ON WHICH THE BUSINESS **
      *  ** OFFICE IS CLOSED.  IT SHOULD BE UPDATED EVERY YEAR TO   **
      *  ** INCLUDE ALL THE DATES OVER WHICH BUSINESS DAYS MIGHT    **
      *  ** NEED TO BE CALCULATED.  NO NEED TO ADD WEEKEND DATES.   **
      *
      *  ** THE ENTRIES IN THIS TABLE CONSIST OF AN 8-DIGIT DATE    **
      *  ** (YYYYMMDD), FOLLOWED BY A 2-DIGIT COUNT OF DAYS WHICH   **
      *  ** MUST BE ADDED TO THE DATE TO GET THE NEXT BUSINESS DAY. **
      *
      *  ** EXAMPLE: THANKSGIVING, 1997, OFF THURSDAY 11/27 AND     **
      *  ** FRIDAY 11/28 UNTIL THE NEXT MONDAY 11/31.  THE ENTRIES  **
      *  ** IN THE TABLE WOULD BE: 1997 11 27 04 AND 1997 11 28 03  **
      *
      *  ** EXAMPLE: CHRISTMAS, 1998, OFF FRIDAY 12/25 THROUGH      **
      *  ** MONDAY 12/28 UNTIL TUESDAY 12/29.  THE ENTRIES IN THE   **
      *  ** TABLE WOULD BE: 1998 12 25 04 AND 1998 12 28 01         **
      *
           03  DW-HOLIDAY-TABLE.
               05  DW-HT-VALUES.
      *                                                     YYYYMMDDCC
                   07  FILLER              PIC  9(10) VALUE 1997112704.
                   07  FILLER              PIC  9(10) VALUE 1997112803.
                   07  FILLER              PIC  9(10) VALUE 1998122504.
                   07  FILLER              PIC  9(10) VALUE 1998122801.
      *
               05  DW-HT-HOLIDAYS          REDEFINES DW-HT-VALUES
                                           OCCURS 4 TIMES
                                           INDEXED BY DW-HT-HX.
                   07  DW-HT-DATE.
                       09  DW-HT-YYYY          PIC  9(04).
                       09  DW-HT-YYYY-R        REDEFINES DW-HT-YYYY.
                           11  DW-HT-CC            PIC  9(02).
                           11  DW-HT-YY            PIC  9(02).
                       09  DW-HT-MM            PIC  9(02).
                       09  DW-HT-DD            PIC  9(02).
                   07  DW-HT-DAYS              PIC  9(02).
      *
      *
      *  ** WEEKDAY NAMES **
      *
           03  DW-DAY-NAMES        VALUE "SUNMONTUEWEDTHUFRISAT".
               05  DW-DAY-NAME             OCCURS 7 TIMES
                                               PIC  X(03).
      *
       SCREEN SECTION.
      *
      *
      *                      M E N U   S C R E E N
      *
       01  MENU-SCREEN.
           03  BLANK SCREEN.
           03  LINE 01  COLUMN 21  VALUE
               "D A T E R O U T I N E T E S T".
      *
           03  LINE 03  COLUMN 10  VALUE "Press: A = Date Edit".
           03  LINE 04  COLUMN 17  VALUE "B = Date days".
           03  LINE 05  COLUMN 17  VALUE "C = Weekday".
           03  LINE 06  COLUMN 17  VALUE "D = Add Days".
           03  LINE 07  COLUMN 17  VALUE "E = Sub Days".
           03  LINE 08  COLUMN 17  VALUE "F = Add Months".
           03  LINE 09  COLUMN 17  VALUE "G = Sub Months".
           03  LINE 10  COLUMN 17  VALUE "H = Add Years".
           03  LINE 11  COLUMN 17  VALUE "I = Sub Years".
           03  LINE 03  COLUMN 37  VALUE "J = Calc Offset".
           03  LINE 04  COLUMN 37  VALUE "K = Compute Age".
           03  LINE 05  COLUMN 37  VALUE "L = Greg to Jul".
           03  LINE 06  COLUMN 37  VALUE "M = Jul to Greg".
           03  LINE 07  COLUMN 37  VALUE "N = Add Days, Business".
           03  LINE 12  COLUMN 25  VALUE "Esc = Exit: ".
           03  PIC  X              TO WS-ANSWER  AUTO.
      *
      *
      *                  I N P U T   S C R E E N S
      *
      *
      *                  G E T   E D I T   D A T E
      *
       01  GET-EDIT-DATE-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (MMDDYYYY): ".
           03  PIC  X(08)          USING SH-EDIT-DATE.
      *
      *
      *              G E T   W O R K   M M D D Y Y Y Y
      *
       01  GET-WORK-MMDDYYYY-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (MM/DD/YYYY): ".
           03  PIC  99/99/9999     USING SH-WORK-MMDDYYYY.
      *
      *
      *              G E T   W O R K   Y Y Y Y M M D D
      *
       01  GET-WORK-YYYYMMDD-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-WORK-YYYYMMDD.
      *
      *
      *                G E T   J U L   Y Y Y Y D D D
      *
       01  GET-JUL-YYYYDDD-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Julian Date (YYYY/DDD): ".
           03  PIC  9999/999       USING SH-JUL-DATE.
      *
      *
      *                  G E T   D A T E   D A Y S
      *
       01  GET-DATE-DAYS-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-WORK-YYYYMMDD.
           03  LINE 16  COLUMN 10  VALUE "Days: ".
           03  PIC  ZZZZZZ         USING SH-DAYS.
      *
      *
      *                G E T   D A T E   M O N T H S
      *
       01  GET-DATE-MONTHS-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-WORK-YYYYMMDD.
           03  LINE 16  COLUMN 10  VALUE "Months: ".
           03  PIC  ZZZZZZ         USING SH-MONTHS.
      *
      *
      *                 G E T   D A T E   Y E A R S
      *
       01  GET-DATE-YEARS-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-WORK-YYYYMMDD.
           03  LINE 16  COLUMN 10  VALUE "Years: ".
           03  PIC  ZZZZ           USING SH-YEARS.
      *
      *
      *                G E T   D A T E   O F F S E T
      *
       01  GET-DATE-OFFSET-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-WORK-YYYYMMDD.
           03  LINE 16  COLUMN 10  VALUE "Offset (ñYYYY/MM/DD): ".
           03  PIC -9999/99/99     USING SH-OFFSET.
      *
      *
      *              G E T   B E G / E N D   D A T E S
      *
       01  GET-BEG-END-YYYYMMDD-SCREEN.
           03  LINE 14  COLUMN 10  VALUE "Begin Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-BEG-YYYYMMDD.
           03  LINE 16  COLUMN 10  VALUE "End Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     USING SH-END-YYYYMMDD.
      *
      *
      *                 O U T P U T   S C R E E N S
      *
      *
      *                    S H O W   R E S U L T
      *
       01  SHOW-RESULT-SCREEN.
           03  LINE 18  COLUMN 20
               PIC  X(20)          FROM  SH-RESULT.
      *
      *
      *                 S H O W   D A T E   D A Y S
      *
       01  SHOW-DATE-DAYS-SCREEN.
           03  LINE 18  COLUMN 20  VALUE "Date Day: ".
           03  PIC  Z,ZZZ,ZZ9      FROM  SH-DAYS.
      *
      *
      *                  S H O W   N E W   D A T E
      *
       01  SHOW-NEW-DATE-SCREEN.
           03  LINE 18  COLUMN 20  VALUE "New Date: ".
           03  PIC  9999/99/99     FROM  SH-WORK-YYYYMMDD.
      *
      *
      *                       S H O W   A G E
      *
       01  SHOW-AGE-SCREEN.
           03  LINE 18  COLUMN 20  VALUE "Years: ".
           03  PIC  Z,ZZZ,ZZZ      FROM  SH-AGE-YEARS.
           03  LINE 19  COLUMN 20  VALUE "Months: ".
           03  PIC  Z,ZZZ,ZZZ      FROM  SH-AGE-MONTHS.
           03  LINE 20  COLUMN 20  VALUE "Days: ".
           03  PIC  Z,ZZZ,ZZZ      FROM  SH-AGE-DAYS.
           03  LINE 22  COLUMN 20  VALUE "Days Only: ".
           03  PIC  ZZ,ZZZ,ZZZ     FROM  SH-AGE-TOTDAYS.
      *
      *
      *               S H O W   J U L   Y Y Y Y D D D
      *
       01  SHOW-JUL-YYYYDDD-SCREEN.
           03  LINE 18  COLUMN 10  VALUE "Julian Date: ".
           03  PIC  9999/999       FROM  SH-JUL-DATE.
      *
      *
      *                  S H O W   Y Y Y Y M M D D
      *
       01  SHOW-YYYYMMDD-SCREEN.
           03  LINE 18  COLUMN 10  VALUE "Date (YYYY/MM/DD): ".
           03  PIC  9999/99/99     FROM  SH-WORK-YYYYMMDD.
      *
      *
      *                  S H O W   M M D D Y Y Y Y
      *
       01  SHOW-MMDDYYYY-SCREEN.
           03  LINE 18  COLUMN 10  VALUE "Date (MM/DD/YYYY): ".
           03  PIC  99/99/9999     FROM  SH-WORK-MMDDYYYY.
      *
       PROCEDURE DIVISION.
      *
      *
      *                        C O N T R O L
      *
       000000-CONTROL.
      *
           PERFORM 000100-PROCESS
              THRU 000100-EXIT
               UNTIL (WS-ESCAPE-FLAG = 1).
      *
       000000-EXIT.
           STOP RUN.
      *
      *
      *                        P R O C E S S
      *
       000100-PROCESS.
      *
           MOVE SPACE TO WS-ANSWER.
           DISPLAY MENU-SCREEN.
           ACCEPT MENU-SCREEN
               ON ESCAPE
                   MOVE 1 TO WS-ESCAPE-FLAG
                   GO TO 000100-EXIT.
           INSPECT WS-ANSWER
               CONVERTING "abcdefghijklmnopqrstuvwxyz"
                       TO "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
      *
           INITIALIZE SCREEN-HOLD-AREA.
      *
           IF (WS-ANSWER = "A")
               PERFORM 010000-DATE-EDIT
                  THRU 010000-EXIT
           ELSE
           IF (WS-ANSWER = "B")
               PERFORM 020000-DATE-DAYS
                  THRU 020000-EXIT
           ELSE
           IF (WS-ANSWER = "C")
               PERFORM 030000-WEEKDAY
                  THRU 030000-EXIT
           ELSE
           IF (WS-ANSWER = "D")
               PERFORM 040000-ADD-DAYS
                  THRU 040000-EXIT
           ELSE
           IF (WS-ANSWER = "E")
               PERFORM 050000-SUBTRACT-DAYS
                  THRU 050000-EXIT
           ELSE
           IF (WS-ANSWER = "F")
               PERFORM 060000-ADD-MONTHS
                  THRU 060000-EXIT
           ELSE
           IF (WS-ANSWER = "G")
               PERFORM 070000-SUBTRACT-MONTHS
                  THRU 070000-EXIT
           ELSE
           IF (WS-ANSWER = "H")
               PERFORM 080000-ADD-YEARS
                  THRU 080000-EXIT
           ELSE
           IF (WS-ANSWER = "I")
               PERFORM 090000-SUBTRACT-YEARS
                  THRU 090000-EXIT
           ELSE
           IF (WS-ANSWER = "J")
               PERFORM 100000-CALC-OFFSET
                  THRU 100000-EXIT
           ELSE
           IF (WS-ANSWER = "K")
               PERFORM 110000-COMPUTE-AGE
                  THRU 110000-EXIT
           ELSE
           IF (WS-ANSWER = "L")
               PERFORM 120000-GREG-JUL
                  THRU 120000-EXIT
           ELSE
           IF (WS-ANSWER = "M")
               PERFORM 130000-JUL-GREG
                  THRU 130000-EXIT
           ELSE
           IF (WS-ANSWER = "N")
               PERFORM 140000-ADD-DAYS-BUSINESS
                  THRU 140000-EXIT.
      *
           MOVE 0 TO WS-ESCAPE-FLAG.
      *
       000100-EXIT.
           EXIT.
      *
      ******************************************************************
      *                                                                *
      *                       D A T E   E D I T                        *
      *                                                                *
      *                      Judson D. McClendon                       *
      *                      Sun Valley Systems                        *
      *                      329 37th Court NE                         *
      *                      Birmingham, AL 35215                      *
      *                         205/853-8440                           *
      *                                                                *
      *    USAGE:  MOVE <MMDDYYYY DATE> TO DW-WORK-DATE-ALPHA.         *
      *            PERFORM 001000-DATE-EDIT                            *
      *               THRU 001000-EXIT.                                *
      *                                                                *
      *    RESULT: DW-DATE-ERROR-FLAG = 0 IF DATE IS VALID             *
      *            DW-DATE-ERROR-FLAG = 1 IF DATE IS NOT VALID         *
      *                                                                *
      *            DW-WORK-YYYYMMDD = GIVEN DATE IN YYYYMMDD FORMAT    *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001000-DATE-EDIT.
      *
      *  ** ERROR FLAG WILL BE RESET TO 0 ON GOOD EXIT **
      *
           MOVE 1 TO DW-DATE-ERROR-FLAG.
      *
           IF (DW-WORK-DATE-ALPHA NOT NUMERIC)
               GO TO 001000-EXIT.
      *
           MOVE DW-WORK-YEAR   TO DW-WORK-YYYY.
           MOVE DW-WORK-MONTH  TO DW-WORK-MM.
           MOVE DW-WORK-DAY    TO DW-WORK-DD.
      *
           IF (DW-WORK-MM < 01 OR > 12)
               GO TO 001000-EXIT.
      *
      *  ** SET DAYS IN FEBRUARY **
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           IF (DW-WORK-DD < 01)
               OR
              (DW-WORK-DD > DW-DAYS-IN-MONTH(DW-WORK-MM))
               GO TO 001000-EXIT.
      *
      *  ** GOOD DATE **
      *
           MOVE 0 TO DW-DATE-ERROR-FLAG.
      *
       001000-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *        C A L C U L A T E   D A T E   D A Y   N U M B E R       *
      *                                                                *
      *                                                                *
      *    RETURNS A NUMBER WHICH IS ONE GREATER FOR EACH SUCCESSIVE   *
      *    DATE.                                                       *
      *                                                                *
      *    USAGE:  MOVE <FIRST DATE>  TO DW-WORK-YYYYMMDD.             *
      *            PERFORM 001100-DATE-DAYS                            *
      *               THRU 001100-EXIT.                                *
      *                                                                *
      *    RESULT: DW-DAYS = DATE DAY NUMBER                           *
      *                                                                *
      *                                                                *
      *    THIS ROUTINE USES A VARIATION OF ZELLER'S CONGRUENCE.       *
      *    THE FORMULA IS:                                             *
      *                                                                *
      *        <DATE DAY NBR> = (     (YEAR * 365)                     *
      *                          + INT(YEAR / 4)                       *
      *                          - INT(YEAR / 100)                     *
      *                          + INT(YEAR / 400)                     *
      *                          + INT(MONTH * 30.6001)                *
      *                          +     DAY) )                          *
      *                                                                *
      *    WHERE: DAY     = DAY OF THE MONTH                           *
      *                                                                *
      *           MONTH   = MONTH + 13  (JAN & FEB)                    *
      *                     MONTH + 1   (MAR - DEC)                    *
      *                                                                *
      *           YEAR    = YEAR - 1    (JAN & FEB)                    *
      *                     YEAR        (MAR - DEC)                    *
      *                                                                *
      *           INT(...) MEANS TAKE THE INTEGER PART (NO ROUNDING)   *
      *                                                                *
      *                                                                *
      *    THE DATE-DAY-NUMBER CAN BE USED TO DETERMINE THE NUMBER OF  *
      *    DAYS BETWEEN TWO DATES BY COMPUTING THE DAY NUMBER OF EACH  *
      *    DATE AND SUBTRACTING, LIKE THIS:                            *
      *                                                                *
      *        MOVE <FIRST DATE>  TO DW-WORK-YYYYMMDD.                 *
      *        PERFORM 001100-DATE-DAYS                                *
      *           THRU 001100-EXIT.                                    *
      *        MOVE DW-DAYS TO <HOLD DAY>.                             *
      *        MOVE <SECOND DATE> TO DW-WORK-YYYYMMDD.                 *
      *        PERFORM 001100-DATE-DAYS                                *
      *           THRU 001100-EXIT.                                    *
      *        SUBTRACT DW-DAYS FROM <HOLD DAY>                        *
      *            GIVING <DAYS BETWEEN DATES>.                        *
      *                                                                *
      ******************************************************************
      *
       001100-DATE-DAYS.
      *
      *  ** ADJUST YEAR AND MONTH **
      *
           MOVE DW-WORK-YYYY TO DW-TEMP-YYYY.
           MOVE DW-WORK-MM   TO DW-TEMP-MM.
           IF (DW-WORK-MM < 03)
               ADD 13 TO DW-TEMP-MM
               SUBTRACT 1 FROM DW-TEMP-YYYY
           ELSE
               ADD 1 TO DW-TEMP-MM.
      *
           MULTIPLY DW-TEMP-YYYY BY 365 GIVING DW-DAYS.
      *
           DIVIDE DW-TEMP-YYYY BY 4 GIVING DW-WORK1.
           ADD DW-WORK1 TO DW-DAYS.
      *
           DIVIDE DW-TEMP-YYYY BY 100 GIVING DW-WORK1.
           SUBTRACT DW-WORK1 FROM DW-DAYS.
      *
           DIVIDE DW-TEMP-YYYY BY 400 GIVING DW-WORK1.
           ADD DW-WORK1 TO DW-DAYS.
      *
           MULTIPLY DW-TEMP-MM BY 30.6001 GIVING DW-WORK1.
           ADD DW-WORK1 TO DW-DAYS.
      *
           ADD DW-WORK-DD TO DW-DAYS.
      *
       001100-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *            C A L C U L A T E   D A Y   O F   W E E K           *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE THIS ROUTINE RETURNS A NUMBER FROM      *
      *    1 TO 7 INDICATING THE DAY OF WEEK ON WHICH THE DATE FALLS.  *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE> TO DW-WORK-YYYYMMDD.                    *
      *            PERFORM 001200-WEEKDAY                              *
      *               THRU 001200-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WEEKDAY = DAY OF WEEK                            *
      *                                                                *
      *                                                                *
      *    THIS ROUTINE USES ZELLER'S CONGRUENCE, EXPRESSED BY THE     *
      *    FOLLOWING FORMULA:                                          *
      *                                                                *
      *        <WEEKDAY> = (INT((13 * MONTH + 3) / 5)                  *
      *                   + DAY                                        *
      *                   + YEAR                                       *
      *                   + INT(YEAR / 4)                              *
      *                   - INT(YEAR / 100)                            *
      *                   + INT(YEAR / 400)                            *
      *                   + 1) MOD 7) + 1                              *
      *                                                                *
      *    WHERE: WEEKDAY = 1 TO 7 WITH  1 = SUNDAY     5 = THURSDAY   *
      *                                  2 = MONDAY     6 = FRIDAY     *
      *                                  3 = TUESDAY    7 = SATURDAY   *
      *                                  4 = WEDNESDAY                 *
      *                                                                *
      *           DAY     = DAY OF THE MONTH                           *
      *                                                                *
      *           MONTH   = MONTH OF THE YEAR (JAN AND FEB COUNT AS    *
      *                      MONTHS 13 AND 14 OF THE PREVIOUS YEAR)    *
      *                                                                *
      *           YEAR    = FOUR DIGIT YEAR (YEAR - 1 IF MONTH IS      *
      *                      JAN OR FEB)                               *
      *                                                                *
      *           INT(...) MEANS TAKE THE INTEGER PART (NO ROUNDING)   *
      *                                                                *
      *           X MOD Y  MEANS THE REMAINDER AFTER DIVIDING Y        *
      *                      INTO X                                    *
      *                                                                *
      ******************************************************************
      *
       001200-WEEKDAY.
      *
      *  ** ADJUST YEAR AND MONTH IF MONTH = JAN OR FEB **
      *
           MOVE DW-WORK-YYYY TO DW-TEMP-YYYY.
           MOVE DW-WORK-MM   TO DW-TEMP-MM.
           IF (DW-WORK-MM < 03)
               ADD 12 TO DW-TEMP-MM
               SUBTRACT 1 FROM DW-TEMP-YYYY.
      *
      *  ** CALCULATE INTO DW-WORK1 **
      *
           COMPUTE DW-WORK1 = (13 * DW-TEMP-MM + 3) / 5.
      *
           ADD DW-WORK-DD
               DW-TEMP-YYYY TO DW-WORK1.
      *
           DIVIDE DW-TEMP-YYYY BY 4 GIVING DW-WORK2.
           ADD DW-WORK2 TO DW-WORK1.
      *
           DIVIDE DW-TEMP-YYYY BY 100 GIVING DW-WORK2.
           SUBTRACT DW-WORK2 FROM DW-WORK1.
      *
           DIVIDE DW-TEMP-YYYY BY 400 GIVING DW-WORK2.
           ADD DW-WORK2 TO DW-WORK1.
      *
           ADD 1 TO DW-WORK1.
      *
           DIVIDE DW-WORK1 BY 7 GIVING DW-WORK2 REMAINDER DW-WEEKDAY.
           ADD 1 TO DW-WEEKDAY.
      *
       001200-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *               A D D   D A Y S   T O   A   D A T E              *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF DAYS THIS ROUTINE WILL  *
      *    ADD THE NUMBER OF DAYS TO THE DATE.                         *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE> TO DW-WORK-YYYYMMDD.                    *
      *            MOVE <DAYS> TO DW-DAYS.                             *
      *            PERFORM 001300-ADD-DAYS                             *
      *               THRU 001300-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER DAYS ADDED            *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001300-ADD-DAYS.
      *
      *  ** SET DAYS IN FEBRUARY **
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           ADD DW-WORK-DD TO DW-DAYS.
      *
           PERFORM 001320-LOOP-MONTH
              THRU 001320-EXIT
              UNTIL (DW-DAYS NOT > DW-DAYS-IN-MONTH(DW-WORK-MM)).
      *
           MOVE DW-DAYS TO DW-WORK-DD.
      *
       001300-EXIT.
           EXIT.
      *
      *
      *
       001320-LOOP-MONTH.
      *
           SUBTRACT DW-DAYS-IN-MONTH(DW-WORK-MM) FROM DW-DAYS.
      *
           ADD 1 TO DW-WORK-MM.
           IF (DW-WORK-MM > 12)
               ADD 1 TO DW-WORK-YYYY
               SUBTRACT 12 FROM DW-WORK-MM.
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
       001320-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *        S U B T R A C T   D A Y S   F R O M   A   D A T E       *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF DAYS THIS ROUTINE WILL  *
      *    SUBTRACT THE NUMBER OF DAYS FROM THE DATE.                  *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE> TO DW-WORK-YYYYMMDD.                    *
      *            MOVE <DAYS> TO DW-DAYS.                             *
      *            PERFORM 001400-SUBTRACT-DAYS                        *
      *               THRU 001400-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER DAYS SUBTRACTED       *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001400-SUBTRACT-DAYS.
      *
           SUBTRACT DW-DAYS FROM DW-WORK-DD GIVING DW-DAYS.
      *
           PERFORM 001420-LOOP-MONTH
              THRU 001420-EXIT
               UNTIL (DW-DAYS > 0).
      *
           MOVE DW-DAYS TO DW-WORK-DD.
      *
       001400-EXIT.
           EXIT.
      *
      *
      *
       001420-LOOP-MONTH.
      *
           SUBTRACT 1 FROM DW-WORK-MM.
           IF (DW-WORK-MM < 01)
               SUBTRACT 1 FROM DW-WORK-YYYY
               ADD 12 TO DW-WORK-MM.
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           ADD DW-DAYS-IN-MONTH(DW-WORK-MM) TO DW-DAYS.
      *
       001420-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *             A D D   M O N T H S   T O   A   D A T E            *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF MONTHS THIS ROUTINE     *
      *    WILL ADD THE NUMBER OF MONTHS TO THE DATE.                  *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE>   TO DW-WORK-YYYYMMDD.                  *
      *            MOVE <MONTHS> TO DW-MONTHS.                         *
      *            PERFORM 001500-ADD-MONTHS                           *
      *               THRU 001500-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER MONTHS ADDED          *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001500-ADD-MONTHS.
      *
           ADD DW-WORK-MM TO DW-MONTHS.
      *
           PERFORM 001520-LOOP-YEAR
              THRU 001520-EXIT
              UNTIL (DW-MONTHS NOT > 12).
      *
           MOVE DW-MONTHS TO DW-WORK-MM.
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           IF (DW-WORK-DD > DW-DAYS-IN-MONTH(DW-WORK-MM))
               MOVE DW-DAYS-IN-MONTH(DW-WORK-MM) TO DW-WORK-DD.
      *
       001500-EXIT.
           EXIT.
      *
      *
      *
       001520-LOOP-YEAR.
      *
           SUBTRACT 12 FROM DW-MONTHS.
           ADD 1 TO DW-WORK-YYYY.
      *
       001520-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *      S U B T R A C T   M O N T H S   F R O M   A   D A T E     *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF MONTHS THIS ROUTINE     *
      *    WILL SUBTRACT THE NUMBER OF MONTHS FROM THE DATE.           *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE>   TO DW-WORK-YYYYMMDD.                  *
      *            MOVE <MONTHS> TO DW-MONTHS.                         *
      *            PERFORM 001600-SUBTRACT-MONTHS                      *
      *               THRU 001600-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER MONTHS SUBTRACTED     *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001600-SUBTRACT-MONTHS.
      *
           SUBTRACT DW-MONTHS FROM DW-WORK-MM GIVING DW-MONTHS.
      *
           PERFORM 001620-LOOP-YEAR
              THRU 001620-EXIT
               UNTIL (DW-MONTHS > 0).
      *
           MOVE DW-MONTHS TO DW-WORK-MM.
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           IF (DW-WORK-DD > DW-DAYS-IN-MONTH(DW-WORK-MM))
               MOVE DW-DAYS-IN-MONTH(DW-WORK-MM) TO DW-WORK-DD.
      *
       001600-EXIT.
           EXIT.
      *
      *
      *
       001620-LOOP-YEAR.
      *
           ADD 12 TO DW-MONTHS.
           SUBTRACT 1 FROM DW-WORK-YYYY.
      *
       001620-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *              A D D   Y E A R S   T O   A   D A T E             *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF YEARS THIS ROUTINE      *
      *    WILL ADD THE NUMBER OF YEARS TO THE DATE.                   *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE>  TO DW-WORK-YYYYMMDD.                   *
      *            MOVE <YEARS> TO DW-YEARS.                           *
      *            PERFORM 001700-ADD-YEARS                            *
      *               THRU 001700-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER YEARS ADDED           *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001700-ADD-YEARS.
      *
           ADD DW-YEARS TO DW-WORK-YYYY.
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           IF (DW-WORK-DD > DW-DAYS-IN-MONTH(DW-WORK-MM))
               MOVE DW-DAYS-IN-MONTH(DW-WORK-MM) TO DW-WORK-DD.
      *
       001700-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *       S U B T R A C T   Y E A R S   F R O M   A   D A T E      *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF YEARS THIS ROUTINE      *
      *    WILL SUBTRACT THE NUMBER OF YEARS FROM THE DATE.            *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE>  TO DW-WORK-YYYYMMDD.                   *
      *            MOVE <YEARS> TO DW-YEARS.                           *
      *            PERFORM 001800-SUBTRACT-YEARS                       *
      *               THRU 001800-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER YEARS SUBTRACTED      *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001800-SUBTRACT-YEARS.
      *
           SUBTRACT DW-YEARS FROM DW-WORK-YYYY.
      *
           MOVE 28 TO DW-DAYS-IN-MONTH(2).
           DIVIDE 400 INTO DW-WORK-YYYY GIVING DW-WORK1
                                     REMAINDER DW-WORK2.
           IF (DW-WORK2 = 0)
               MOVE 29 TO DW-DAYS-IN-MONTH(2)
           ELSE
               DIVIDE 100 INTO DW-WORK-YYYY GIVING DW-WORK1
                                         REMAINDER DW-WORK2
               IF (DW-WORK2 NOT = 0)
                   DIVIDE 4 INTO DW-WORK-YYYY GIVING DW-WORK1
                                           REMAINDER DW-WORK2
                   IF (DW-WORK2 = 0)
                       MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           IF (DW-WORK-DD > DW-DAYS-IN-MONTH(DW-WORK-MM))
               MOVE DW-DAYS-IN-MONTH(DW-WORK-MM) TO DW-WORK-DD.
      *
       001800-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *            C A L C U L A T E   D A T E   O F F S E T           *
      *                                                                *
      *                                                                *
      *    ADDS A SIGNED OFFSET IN THE FORM +-YYYYMMDD TO A DATE       *
      *    IN YYYYMMDD FORM.                                           *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <DATE>   TO DW-WORK-YYYYMMDD.                  *
      *            MOVE <OFFSET> TO DW-OFFSET.                         *
      *            PERFORM 001900-CALC-OFFSET                          *
      *               THRU 001900-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD DATE AFTER OFFSET APPLIED          *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       001900-CALC-OFFSET.
      *
           MOVE DW-OFFSET TO DW-OFFSET-UNSIGNED.
      *
           IF (DW-OFFSET POSITIVE)
               ADD DW-OFFSET-YYYY TO DW-WORK-YYYY
               MOVE DW-OFFSET-MM TO DW-MONTHS
               PERFORM 001500-ADD-MONTHS
                  THRU 001500-EXIT
               MOVE DW-OFFSET-DD TO DW-DAYS
               PERFORM 001300-ADD-DAYS
                  THRU 001300-EXIT
           ELSE
           IF (DW-OFFSET NEGATIVE)
               SUBTRACT DW-OFFSET-YYYY FROM DW-WORK-YYYY
               PERFORM 001920-SUBTRACT-MONTH
                  THRU 001920-EXIT
                   DW-OFFSET-MM TIMES
               MOVE DW-OFFSET-DD TO DW-DAYS
               PERFORM 001400-SUBTRACT-DAYS
                  THRU 001400-EXIT.
      *
       001900-EXIT.
           EXIT.
      *
      *
      *
       001920-SUBTRACT-MONTH.
      *
           SUBTRACT 1 FROM DW-WORK-MM.
           IF (DW-WORK-MM < 01)
               SUBTRACT 1 FROM DW-WORK-YYYY
               ADD 12 TO DW-WORK-MM.
      *
       001920-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *                   C O M P U T E   A G E                        *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN THE BEGIN DATE AND END DATE THIS ROUTINE         *
      *    CALCULATES THE AGE IN YEARS, MONTHS, DAYS AND TOTAL DAYS.   *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <BEGIN DATE> TO DW-BEG-YYYYMMDD.               *
      *            MOVE <END DATE>   TO DW-END-YYYYMMDD.               *
      *            PERFORM 002000-COMPUTE-AGE                          *
      *               THRU 002000-EXIT.                                *
      *                                                                *
      *    RESULT: DW-AGE-YEARS   = WHOLE YEARS                        *
      *            DW-AGE-MONTHS  = MONTHS OVER WHOLE YEAR             *
      *            DW-AGE-DAYS    = DAYS OVER WHOLE MONTH              *
      *                                                                *
      *        (IE: AGE = YEARS + MONTHS + DAYS)                       *
      *                                                                *
      *            DW-AGE-TOTDAYS = TOTAL AGE IN DAYS                  *
      *                                                                *
      *            DW-BEG-YYYYMMDD = HAS BEEN MODIFIED                 *
      *            DW-END-YYYYMMDD = HAS BEEN MODIFIED                 *
      *                                                                *
      ******************************************************************
      *
       002000-COMPUTE-AGE.
      *
      *  ** CALCULATE AGE IN DAYS **
      *
           MOVE DW-END-YYYYMMDD TO DW-WORK-YYYYMMDD.
           PERFORM 001100-DATE-DAYS
              THRU 001100-EXIT.
           MOVE DW-DAYS TO DW-AGE-TOTDAYS.
      *
           MOVE DW-BEG-YYYYMMDD TO DW-WORK-YYYYMMDD.
           PERFORM 001100-DATE-DAYS
              THRU 001100-EXIT.
           SUBTRACT DW-DAYS FROM DW-AGE-TOTDAYS.
      *
      *  ** CALCULATE AGE IN YEARS, MONTHS & DAYS **
      *
           IF (DW-END-DD < DW-BEG-DD)
               PERFORM 002020-ROLL-DAY
                  THRU 002020-EXIT.
           COMPUTE DW-AGE-DAYS = DW-END-DD - DW-BEG-DD.
      *
           IF (DW-END-MM < DW-BEG-MM)
               PERFORM 002040-ROLL-MONTH
                  THRU 002040-EXIT.
           COMPUTE DW-AGE-MONTHS = DW-END-MM - DW-BEG-MM.
      *
           COMPUTE DW-AGE-YEARS = DW-END-YYYY - DW-BEG-YYYY.
      *
       002000-EXIT.
           EXIT.
      *
      *
      *
       002020-ROLL-DAY.
      *
           SUBTRACT 1 FROM DW-END-MM.
      *
           IF (DW-END-MM < 01)
               PERFORM 002040-ROLL-MONTH
                  THRU 002040-EXIT.
      *
           IF (DW-END-MM = 02)
               MOVE 28 TO DW-DAYS-IN-MONTH(2)
               DIVIDE 400 INTO DW-END-YYYY GIVING DW-WORK1
                                          REMAINDER DW-WORK2
               IF (DW-WORK2 = 0)
                   MOVE 29 TO DW-DAYS-IN-MONTH(2)
               ELSE
                   DIVIDE 100 INTO DW-END-YYYY GIVING DW-WORK1
                                              REMAINDER DW-WORK2
                   IF (DW-WORK2 NOT = 0)
                       DIVIDE 4 INTO DW-END-YYYY GIVING DW-WORK1
                                               REMAINDER DW-WORK2
                       IF (DW-WORK2 = 0)
                           MOVE 29 TO DW-DAYS-IN-MONTH(2).
      *
           ADD DW-DAYS-IN-MONTH(DW-END-MM) TO DW-END-DD.
      *
       002020-EXIT.
           EXIT.
      *
      *
      *
       002040-ROLL-MONTH.
      *
           SUBTRACT 1 FROM DW-END-YYYY.
      *
           ADD 12 TO DW-END-MM.
      *
       002040-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *              G R E G O R I A N   T O   J U L I A N             *
      *                                                                *
      *                                                                *
      *    CONVERTS A DATE IN GREGORIAN DATE FORM (YYYYMMDD) INTO      *
      *    JULIAN DATE FORM (YYYYDDD).                                 *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <GREGORIAN DATE> TO DW-WORK-YYYYMMDD           *
      *            PERFORM 002100-GREG-JUL                             *
      *               THRU 002100-EXIT.                                *
      *                                                                *
      *    RESULT: DW-JUL-DATE = DATE IN JULIAN DATE FORM (YYYYDDD)    *
      *                                                                *
      *            DW-WORK-YYYYMMDD = HAS BEEN MODIFIED                *
      *                                                                *
      ******************************************************************
      *
       002100-GREG-JUL.
      *
           MOVE DW-WORK-YYYY TO DW-JUL-YYYY.
      *
           PERFORM 001100-DATE-DAYS
              THRU 001100-EXIT.
      *
           MOVE DW-DAYS TO DW-WORK3.
      *
           SUBTRACT 1 FROM DW-JUL-YYYY GIVING DW-WORK-YYYY.
      *
           MOVE 12 TO DW-WORK-MM.
      *
           MOVE 31 TO DW-WORK-DD.
      *
           PERFORM 001100-DATE-DAYS
              THRU 001100-EXIT.
      *
           SUBTRACT DW-DAYS FROM DW-WORK3
               GIVING DW-JUL-DDD.
      *
       002100-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *              J U L I A N   T O   G R E G O R I A N             *
      *                                                                *
      *                                                                *
      *    CONVERTS A DATE IN JULIAN DATE FORM (YYYYDDD) INTO          *
      *    GREGORIAN DATE FORM (YYYYMMDD).                             *
      *                                                                *
      *                                                                *
      *    USAGE:  MOVE <JUILAN DATE> TO DW-JUL-DATE.                  *
      *            PERFORM 002200-JUL-GREG                             *
      *               THRU 002200-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE IN GREGORIAN FORM           *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       002200-JUL-GREG.
      *
           SUBTRACT 1 FROM DW-JUL-YYYY GIVING DW-WORK-YYYY.
      *
           MOVE 12 TO DW-WORK-MM.
      *
           MOVE 31 TO DW-WORK-DD.
      *
           MOVE DW-JUL-DDD TO DW-DAYS.
      *
           PERFORM 001300-ADD-DAYS
              THRU 001300-EXIT.
      *
       002200-EXIT.
           EXIT.
      *
      *
      *
      ******************************************************************
      *                                                                *
      *     A D D   D A Y S   T O   A   D A T E,  B U S I N E S S      *
      *                                                                *
      *                                                                *
      *    WHEN GIVEN ANY DATE AND A NUMBER OF DAYS THIS ROUTINE WILL  *
      *    ADD THE NUMBER OF DAYS TO THE DATE AND RETURN THE FIRST     *
      *    BUSINESS DAY ON OR AFTER THE RESULTANT DATE.                *
      *                                                                *
      *    USAGE:  MOVE <DATE> TO DW-WORK-YYYYMMDD.                    *
      *            MOVE <DAYS> TO DW-DAYS.                             *
      *            PERFORM 002300-ADD-DAYS-BUSINESS                    *
      *               THRU 002300-EXIT.                                *
      *                                                                *
      *    RESULT: DW-WORK-YYYYMMDD = DATE AFTER DAYS ADDED            *
      *            DW-DAYS-IN-MONTH = CORRECT FOR YEAR OF THIS DATE    *
      *                                                                *
      ******************************************************************
      *
       002300-ADD-DAYS-BUSINESS.
      *
           PERFORM 001300-ADD-DAYS
              THRU 001300-EXIT.
      *
           PERFORM 001200-WEEKDAY
              THRU 001200-EXIT.
      *
           IF (DW-WEEKDAY = 7)
               MOVE 2 TO DW-DAYS
               PERFORM 001300-ADD-DAYS
                  THRU 001300-EXIT
           ELSE
           IF (DW-WEEKDAY = 1)
               MOVE 1 TO DW-DAYS
               PERFORM 001300-ADD-DAYS
                  THRU 001300-EXIT.
      *
      *  ** IF DATE IS A HOLIDAY, ADD NBR DAYS TO NEXT BUSINESS DAY **
      *
           SET DW-HT-HX TO 1.
           SEARCH DW-HT-HOLIDAYS
               WHEN (DW-HT-DATE(DW-HT-HX) = DW-WORK-YYYYMMDD)
                   MOVE DW-HT-DAYS(DW-HT-HX) TO DW-DAYS
                   PERFORM 001300-ADD-DAYS
                      THRU 001300-EXIT.
      *
       002300-EXIT.
           EXIT.
      *
      *
      *                 T E S T   D A T E   E D I T
      *
       010000-DATE-EDIT.
      *
           DISPLAY GET-EDIT-DATE-SCREEN.
           ACCEPT GET-EDIT-DATE-SCREEN
               ON ESCAPE
                   GO TO 010000-EXIT.
      *
           MOVE SH-EDIT-DATE TO DW-WORK-DATE-ALPHA.
      *
           PERFORM 001000-DATE-EDIT
              THRU 001000-EXIT.
      *
           IF (DW-DATE-ERROR-FLAG = 0)
               MOVE "DATE VALID"   TO SH-RESULT
           ELSE
               MOVE "DATE INVALID" TO SH-RESULT.
           DISPLAY SHOW-RESULT-SCREEN.
      *
           GO TO 010000-DATE-EDIT.
      *
       010000-EXIT.
           EXIT.
      *
      *
      *                 T E S T   D A T E   D A Y S
      *
       020000-DATE-DAYS.
      *
           DISPLAY GET-WORK-YYYYMMDD-SCREEN.
           ACCEPT GET-WORK-YYYYMMDD-SCREEN
               ON ESCAPE
                   GO TO 020000-EXIT.
      *
           MOVE SH-WORK-YYYY TO DW-WORK-YYYY.
           MOVE SH-WORK-MM   TO DW-WORK-MM.
           MOVE SH-WORK-DD   TO DW-WORK-DD.
      *
           PERFORM 001100-DATE-DAYS
              THRU 001100-EXIT.
      *
           MOVE DW-DAYS TO SH-DAYS.
           DISPLAY SHOW-DATE-DAYS-SCREEN.
      *
           GO TO 020000-DATE-DAYS.
      *
       020000-EXIT.
           EXIT.
      *
      *
      *                   T E S T   W E E K D A Y
      *
       030000-WEEKDAY.
      *
           DISPLAY GET-WORK-YYYYMMDD-SCREEN.
           ACCEPT GET-WORK-YYYYMMDD-SCREEN
               ON ESCAPE
                   GO TO 030000-EXIT.
      *
           MOVE SH-WORK-YYYY TO DW-WORK-YYYY.
           MOVE SH-WORK-MM   TO DW-WORK-MM.
           MOVE SH-WORK-DD   TO DW-WORK-DD.
      *
           PERFORM 001200-WEEKDAY
              THRU 001200-EXIT.
      *
           MOVE DW-DAY-NAME(DW-WEEKDAY) TO SH-RESULT.
           DISPLAY SHOW-RESULT-SCREEN.
      *
           GO TO 030000-WEEKDAY.
      *
       030000-EXIT.
           EXIT.
      *
      *
      *                  T E S T   A D D   D A Y S
      *
       040000-ADD-DAYS.
      *
           DISPLAY GET-DATE-DAYS-SCREEN.
           ACCEPT GET-DATE-DAYS-SCREEN
               ON ESCAPE
                   GO TO 040000-EXIT.
      *
           MOVE SH-WORK-YYYY TO DW-WORK-YYYY.
           MOVE SH-WORK-MM   TO DW-WORK-MM.
           MOVE SH-WORK-DD   TO DW-WORK-DD.
           MOVE SH-DAYS      TO DW-DAYS.
      *
           PERFORM 001300-ADD-DAYS
              THRU 001300-EXIT.
      *
           MOVE DW-WORK-YYYY TO SH-WORK-YYYY.
           MOVE DW-WORK-MM   TO SH-WORK-MM.
           MOVE DW-WORK-DD   TO SH-WORK-DD.
           DISPLAY SHOW-NEW-DATE-SCREEN.
      *
           GO TO 040000-ADD-DAYS.
      *
       040000-EXIT.
           EXIT.
      *
      *
      *             T E S T   S U B T R A C T   D A Y S
      *
       050000-SUBTRACT-DAYS.
      *
           MOVE 0 TO DW-DAYS.
           DISPLAY GET-DATE-DAYS-SCREEN.
           ACCEPT GET-DATE-DAYS-SCREEN
               ON ESCAPE
                   GO TO 050000-EXIT.
      *
           MOVE SH-WORK-YYYY TO DW-WORK-YYYY.
           MOVE SH-WORK-MM   TO DW-WORK-MM.
           MOVE SH-WORK-DD   TO DW-WORK-DD.
           MOVE SH-DAYS      TO DW-DAYS.
      *
           PERFORM 001400-SUBTRACT-DAYS
              THRU 001400-EXIT.
      *
           MOVE DW-WORK-YYYY TO SH-WORK-YYYY.
           MOVE DW-WORK-MM   TO SH-WORK-MM.
           MOVE DW-WORK-DD   TO SH-WORK-DD.
           DISPLAY SHOW-NEW-DATE-SCREEN.
      *
           GO TO 050000-SUBTRACT-DAYS.
      *
       050000-EXIT.
           EXIT.
      *
      *
      *                  T E S T   A D D   M O N T H S
      *
       060000-ADD-MONTHS.
      *
           DISPLAY GET-DATE-MONTHS-SCREEN.
           ACCEPT GET-DATE-MONTHS-SCREEN
               ON ESCAPE
                   GO TO 060000-EXIT.
      *
           MOVE SH-WORK-YYYY TO DW-WORK-YYYY.
           MOVE SH-WORK-MM   TO DW-WORK-MM.
           MOVE SH-WORK-DD   TO DW-WORK-DD.
           MOVE SH-MONTHS    TO DW-MONTHS.
      *
           PERFORM 001500-ADD-MONTHS
              THRU 001500-EXIT.
      *
           MOVE DW-WORK-YYYY TO SH-WORK-YYYY.
           MOVE DW-WORK-MM   TO SH-WORK-MM.
           MOVE DW-WORK-DD   TO SH-WORK-DD.
           DISPLAY SHOW-NEW-DATE-SCREEN.
      *
           GO TO 060000-ADD-MONTHS.
      *
       060000-EXIT.
           EXIT.
      *
      *
      *             T E S T   S U B T R A C T   M O N T H S
      *
       070000-SUBTRACT-MONTHS.
      *
           MOVE 0 TO DW-MONTHS.
           DISPLAY GET-DATE-MONTHS-SCREEN.
           ACCEPT GET-DATE-MONTHS-SCREEN
               ON ESCAPE
                   GO TO 070000-EXIT.
      *
           MOVE SH-WORK-YYYY TO DW-WORK-YYYY.
           MOVE SH-WORK-MM   TO DW-WORK-MM.
           MOVE SH-WORK-DD   TO DW-WORK-DD.
           MOVE SH-MONTHS    TO DW-MONTHS.
      *
           PERFORM 001600-SUBTRACT-MONTHS
              THRU 001600-EXIT.
      *
           MOVE DW-WORK-YYYY TO SH-WORK-YYYY.
           MOVE DW-WORK-MM   TO SH-WORK-MM.
           MOVE DW-WORK-DD   TO SH-WORK-DD.
           DISPLAY SHOW-NEW-DATE-SCREEN.
      *
           GO TO 070000-SUBTRACT-MONTHS.
      *
       070000-EXIT.
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