NAME: MONDAY.PRO PURPOSE: convert year and day_of_year to month and day or vice versa CALLING SEQUENCE: monday,year,doy,mo,day,[/YEARDAY] If the keyword, YEARDAY is set, the routine will take the year, the month, and the day of the year and return the day number of the year (Jan. 1 = 1). If the keyword is not set, the routine will take the year and day of year and return the month and day. Copyright 1996-2013 United States Government as represented by the Administrator of the National Aeronautics and Space Administration. All Rights Reserved.