According to NASA, the Earth takes about 365.2422 days to complete its orbit around the sun. This means adjustments have to be made to our calendar on a regular basis in order to keep our calendar ...

Also eight, 12 and 16 years ago. The idea behind leap days is to prevent the 365-day calendar from running too far ahead of the time it takes the Earth to circle the sun, which is 365. 2422 days.

As a result, every year the common, 365-day calendar lags behind the solar year by about one quarter of a day. While this might not seem like much of a difference, over four years, it works out to ...

The calendar oddity means this year is actually 366 days long, instead of the regular 365. Here's why leap years occur. Leap years exist because while the world follows a 365-day Gregorian ...

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 ...