In case you didn't know it, today is Leap Second Day. Don't know what that means? We didn't either, so we figured you might not either, but we've got you covered.

According to The International Earth Rotation and Reference Systems, an extra second is being added to account for a discrepancy between Earth's rotation and the world's atomic clock.

Apparently, scientists who are much much more smarter than me have determined that the Earth's rotation is gradually slowing down a bit, so a leap second is required to get our time back in sync with the planet's rotation.

So, if you don't want to get a second behind, you better set all your clocks ahead one second today.