Science t-shirts | TFI Pi Day long-sleeved t-shirt
Long-sleeved funny Pi Day t-shirt featuring the slogan "TFI Pi Day".
Pi Day happens every year on the 14th March (which happens to coincide with Einsteins birthday) or as they say in America, 3/14.
As Im sure you know, the first 3 digits of pi are 3.14.
Incidentally, also watch out for Pi Approximation Day on the 22nd of July, or 22/7 in the day/month day format.
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