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IMSL Name:  NDYIN (Single precision version)
 
Revised:    May 30, 1991
 
Purpose:    Give the date corresponding to the number of days since
            January 1, 1900.
 
Usage:      CALL NDYIN (NDAYS, IDAY, MONTH, IYEAR)
 
Arguments:
   NDAYS  - Number of days since January 1, 1900.  (Input)
   IDAY   - Day of the input date.  (Output)
   MONTH  - Month of the input date.  (Output)
   IYEAR  - Year of the input date.  (Output)
            1950 would correspond to the year 195 A.D. and -50
            would correspond to year 50 B.C.
 
Remark:
   The beginning of the Gregorian calendar was the first day after
   October 4, 1582, which became October 15, 1582.  Prior to that,
   the Julian calendar was in use.  Routine NDYIN makes the proper
   adjustment for the change in calendars.
 
Keywords:   Utilities; Calendar
 
GAMS:       R
 
Chapters:   STAT/LIBRARY Utilities
            MATH/LIBRARY Utilities
 
Page No.:   STAT/LIBRARY User's Manual page 1431
            MATH/LIBRARY User's Manual page 1310