Yes, every four years we add a day in February to compensate for the fact that it takes the Earth slightly longer than 365 days to orbit the Sun once (about 5 hours and 49 minutes longer). But did you know that every 100 years we don’t have a leap year because by adding the extra day every four years we end up adding too much? There’s one other exception to the rule. Every 400 years we do have a leap year.

Here’s the rule of thumb: If the year is divisible by 4, then it’s a leap year. If the year is divisible by 100, then it’s not a leap year. But, if the year is divisible by 400 then it is a leap year.

Have I totally confused you? If you’re really interested in finding out why you can follow the math at Bad Astronomy or the history in this op-ed.

2 Responses to “Happy Leap Day!”

Categories

Paid Advertisements

Suicide Prevention Lifeline Veterans Press "1"
NationalResourceDirectory.gov

Wednesday Hero

Wednesday Hero was started in 2005 to honor the Men and Women of the United States Military. To let people know who was fighting, and dying, for them.

Wednesday HeroWhat Is Wednesday Hero?

Get A Copy Of The Post

3/5 Darkhorse Memorial