This program will pop up a new window displaying the Gregorian calendar for the selected month of the selected year. It follows the standard calendar. However, it was implemented for us in 1752, so the days of the week before then were essentially rewritten.
NOTES:
- Rules about leap years on multiples of 4000 are debated. I kept them leap years, although it has been suggested that it would be more accurate to keep 365 days on those multiples. It won't matter for a long time.
- In 1752, eleven days were lost in September due to the calendar change from Julian to Gregorian. While the changes officially affected everything preceding, the people living in 1 A.D. would NOT have thought January 1st was a Monday!
© Dave McColgin, 2003