The modern calendar has Roman Catholic roots. As the sun does not adhere exactly to the earthly calendar, leap days are ...

For example, the Julian date for December 11 ... Contrast with "Gregorian date," which is the common calendar notation of month, day and year. THIS DEFINITION IS FOR PERSONAL USE ONLY.

The Lent season – which is a 40-day period of prayer and fasting leading up to Easter – starts on Ash Wednesday and ends on ...

Every four years, an extra day is added to the calendar, But even with leap day, the math doesn't exactly, well, math.

There are typically 365 days in a year, but in 2024 we get 366. Here's the history behind February's bonus day.

By Marco Elsy Ah, February. The runt of the calendar litter, the month that even the Romans couldn’t be bothered to flesh out ...

Prior to the Gregorian and even Julian calendars, Roman King Numa Pompilius (715-673 BC) set about creating a calendar with equal-length months, the University of Chicago said. "When Numa ...