Did you know that Jan. 23 is National Pie Day? The baking "holiday" started in the mid-1970s after Boulder, Colorado teacher Charlie Papazian declared his own birthday, Jan. 23, to be National Pie ...

Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Schools and museums often plan events to ...

It's National Pi Day, so treat yourself to some pie — pizza, dessert or both, whatever your heart desires! That first "Pi" isn't a typo and differs from the tasty "pie" we eat, though we could ...

You can follow him on X @GabeHauari or email him at [email protected]. This article originally appeared on USA TODAY: National Pi Day 2025: Pie and pizza deals at Blaze, Marco's, more ...