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

The emperor Caesar adopted a 365-day calendar and added 10 days to it, including a leap day in February every four years, writes Calendar.com. Eventually, the calendar we all know was adopted by ...

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

Eventually, during Julius Caesar's rule, the calendar no longer matched the actual seasons so the emperor adopted a 365-day calendar and added 10 days the calendar, including a leap day in ...