Program GREGDATE

Usage

    gregdate [<jdate>]

where jdate is a Julian date (= 1000 * year + day(1...365,366)

Summary

The GREGDATE program computes and displays calendar-style date "Weekday, Month DD, YYYY" for the indicated Julian date YYYYDDD. It also displays the day-of-week (Sunday, Monday, ..., or Saturday), and indicates whether or not daylight savings time should be in effect. In case jdate is out of range, or not given as a command line argument, GREGDATE prompts the user for it.

Examples

Some sample executions of this program are as indicated below:

     % gregdate 1988200
    
        Monday, July 18, 1988
        Daylight Savings Time in effect.

and

     % gregdate
      
     Program GREGDATE takes julian date (in form YYYYDDD) and
     returns the date in form "Wkday, Month DD, YYYY".
      
         Usage:  "gregdate [<JDATE>]" 
      
     (if the JDATE command-line argument is missing, prompts the 
     user for JDATE)
      
 
     Enter Julian date YYYYDDD [1988200] >> 1995250
    
        Thursday, Sept. 7, 1995
        Daylight Savings Time in effect.

and also (an incorrect argument list in this example):

 
     % gregdate foo bar
      
     Program GREGDATE takes julian date (in form YYYYDDD) and
     returns the date in form "Wkday, Month DD, YYYY".
      
         Usage:  "gregdate [<JDATE>]" 
      
     (if the JDATE command-line argument is missing, prompts the 
     user for JDATE)
      
 
     Enter Julian date YYYYDDD [1988200] >> 1995100
 
     Monday, April 10, 1995
     Daylight Savings Time in effect.

Program GREGDATE

Usage

Summary

Examples

See Also