Last call on Blue Moon...

AFP/Getty Images

Saturday night you will be able to witness the final Blue Moon of the decade.

It actually has nothing to do with the "color" it means there have been two full moons in the same month. Blue moons occur about once every two-and-a-half years, and at around 7:37 pm Saturday night you can witness history or something.

2018 was the first year since 1999 with two blue moons in a single year. You'll have to wait until 2037 for that to happen again.