The original countdown t-shirt, but in rainbow colors! This one of a kind t-shirt is mathematician approved, with all leap years accounted for. Serving any and all ages!
If you have a loved one that's celebrating a birthday and totally awesome, you're going to love giving them this fun shirt to wear on their special day! They will be sure to receive many compliments.
This product is custom and not created until the order is processed. Please include your desired age before adding to cart and our mathematicians will get to work on your custom calculated t-shirt!