doomsday_test, a FORTRAN77 code which calls doomsday(), which is given the year, month and day of a date, and uses John Conway's doomsday algorithm to determine the corresponding day of the week.
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doomsday, a FORTRAN77 code which is given the year, month and day of a date, and uses John Conway's doomsday algorithm to determine the corresponding day of the week.