Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Why does a leap year have 366 days?

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 ...

they technically only have a birthday every four years on the actual leap day. Those leapers don’t get a birthday this year. Wondering what exactly is a leap day or leap year? Here's what to know.

February 29 only comes around every four years - do you know the Irish history and traditions of Leap Day? Ireland's folklore is full of wonderful, funny, strange, but sometimes outdated ...