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

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 ...

The Romans added January and February to the calendar but ran into a problem — math and superstition. Here's why February became the odd month out.

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

What to know about February and leap year. Why do we have a leap years? Leap years account for the inaccurate measure of time on the 365-day calendar. Technically it takes 365.242190 days for the ...

An unusual quirk in the traditional Chinese calendar means the occasion Lunar New Year's Eve, also known as danian sanashi, will appear to be "skipped" over the next five years.

Every fourth year, those extra quarter-days get added to the calendar to make one full day – February 29. 2 This means every leap year has 366 days! 3 A leap year happens when the year can be ...

We've used leap years for over 2,000 years so our calendars are more in sync with the Earth’s rotation around the Sun. What is a leap year? Generally we define a year as 365 days, but a full ...

Eventually, the calendar we all know was adopted by Pope Gregory XIII in 1582, and it's changed little since then — not that the system is flawless. February gets a leap year once every four ...