Day of Week Calculator

Gregorian and Julian Calendars

YYYYMMDD            Day of Week            

Do not enter a date between Oct 5, 1582 and Oct 14, 1582. These dates did not exist in the conversion.

The math behind this is explained in source code comments. Leap Year Facts
Midpoint between two dates/times Also, add or subtract to/from a date/time.
Programming day-of-week from date.
Determine dates in your head. If you know today's date, you are all set.
Misc. programs