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

The original Roman calendar divided the year from March to December into 10 months of either 29 or 31 days, based on lunar ...

Well, Christmas has come and gone. All in all, and only speaking for myself, it wasn’t a bad holiday. The celebrations were festive, people seemed to be in a cheerful mood, and the museum ...

At least, that was the idea. Revolutionary as the Julian calendar was, it wasn't perfect, and fell out of alignment over time. In 1582, Pope Gregory XIII introduced the Gregorian calendar ...

Presidents Day is a federal holiday celebrated each year in mid-February to honor past U.S. presidents. Locally, it's part of ...

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

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

"I try to keep it running." Bowan is one of the many Orthodox Christians who celebrate the holiday according to the Julian Calendar. A part of his life he's always embraced. "This is what I was ...

The shift from Washington’s Birthday to Presidents' Day began in the late 1960s, when Congress proposed the Uniform Monday ...

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 ...