So I didn't know about this till my father told me about this a few weeks ago. If you go to your calendar for this year and go to February you'll see this-

February normally has only 28 days. But for some reason it has one more day-
Then I decided to check on Google why there's 29 days in February for 2020 and this is what I got-

So yeah, apparently the last day of February, which is now the 29th, is going to be Leap Day

And if you know about this already well good for you-