Leap year: An imperfect science explained (video)

leap-year-Morgan Lane Photography Shutterstock

Today is February 29, that special extra day that comes just once every four years. As many of you likely already know, this added day is the result of some inconvenient math. Namely, a full Earth year — the time it takes for our planet to make one full trip around the sun — is about six hours more than the 365 days we observe on the calendar. To make up for this, we add in an extra day every four years (6 hours x 4 = 24 hours, or 1 full day). Now, you might think that that’s the end of it. But it’s not even close.

The math behind the Gregorian calendar is far more complex, and not nearly as perfect as one would expect. This pesky truth is explained by professional speaker and “time management expert” C.G.P. Grey, whose latest YouTube video explains the sheer madness behind our calendar imperfections. Check it out below:

[Image via Morgan Lane Photography/Shutterstock]