February 29th birthdays only happen every four years because during the other three years, the shortest month of the year ...

The Gregorian calendar, named after Pope Gregory XIII (1502–1585), is used almost throughout the world and establishes that every fourth year is a leap year that has one extra day, Feb. 29. What is ...

A tradition going back as early as the fifteenth century, a Leap Year comes around every four years. Usually, February only lasts 28 days. However, during Leap Years, a "Leap Day" is added to the end ...

This February is a little longer than usual. It's a leap year, and today — Thursday, Feb. 29 — is Leap Day. The calendar oddity means this year is actually 366 days long, instead of the regular 365.

February is packed with interesting observances, but one that stands out is Leap Day—and the Leap Year that makes it possible! If you’re wondering “When is the next leap year?” or curious about why we ...

Read full article: What would happen without a Leap Day? More than you might think Father and daughter looking up at the Saturn V Rocket. Read full article: Giant leap of fun: Celebrate Leap Day at ...