Happens every four years, February 29. Couple of notes:
Leap day used to mean that women proposed marriage to men. Today, only 16% of women said they "might" try that.
Alex Emerick celebrated his 25th birthday on 2/29. Actually, he turned 100 (2/29/1920), but what a cool milestone!
Lastly, do you think this milk will last 4 years?