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Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 (3/14 in the month/day date format) since 3, 1, and 4 are the first three significant digits of π. In 2009, the United States House of Representatives supported the designation of Pi Day.

Happy Pi Day / Pie Day / Albert Einstein's Day

Features:

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So what are you waiting for!! Download this Happy Pi Day / Pie Day / Albert Einstein's Day app and send out Happy Pi Day / Pie Day / Albert Einstein's Day cards.

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