Every Day Is Pi Day Men's T-Shirt

My son's birthday is 3/14. Time to buy another one as he outgrew his other!

Since PI is an irrational number, would not a shirt celebrating/based upon it also be irrational? Is it rational to wear clothing celebrating/based upon something BY DEFINITION irrational?

I ordered the "pi day" shirt. It is the first time I've ordered a $6.00 shirt. I am very impressed with the quality of the shirt. I was wondering what I was going to get for $6.00. Very good quality. I wore it for the TEN days around pi day because, even though it was a good price, I didn't want to just wear it for ONE DAY! Very fun. Everybody loved it. Thank you very much. Can't wait to order again!