Feb. 29 is more than just an extra day we have once every four years. There is some science behind it. Here's how leap days ...

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 ...

Easter is fast approaching. Here's a look at why the date of Easter changes every year and what to know about the holiday.