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Did you know that Pi flipped spells Pie? ?

— Cartoon Network (@cartoonnetwork)

Albert Einstein’s birthday also being is a magnificent twist of fate! Happy Birthday Albert!

— Science Channel (@ScienceChannel)

This is what everyone means by , right?

— Pittsburgh Steelers (@steelers)

Happy .

— Barack Obama (@BarackObama)

Not quite …

— Sesame Street (@sesamestreet)

Happy ! I spent way too long making little flags celebrating female scientists for this slice of pie.

— Sarah Mirk (@sarahmirk)

Happy ! Live free or Pi hard ???

— Victoria Justice (@VictoriaJustice)

Happy !

— The Simpsons (@TheSimpsons)

Happy ! What’s your favorite kind of pie?

— Sandra Lee (@SandraLee)

Happy , everybody!

— Comic Book Resources (@CBR)