One time February had 30 days while July names for Julius Caesar and August named for Augustus Caesar had 30 days. The two men were jealous though because other months had 31 days so they each took one day from February in order that their months also had 31 days leaving February with 28 days except for leap year when it has 29 days.

The question is why were they so selfish to both take a day from the same month? I don't know the answer but it is disturbing.
I hope I haven't accidently ruined anyone's weekend on this strange mystery.