円周率の日
1. Pi DayPi Day is an unofficial holiday commemorating the mathematical constant π (pi). Pi Day is celebrated on March 14 (or 3/14 in month/day date format), since 3, 1 and 4 are the three most significant digits of π in the decimal form. In 2009, the United States House of Representatives supported the designation of Pi Day. Pi Approximation Day is held on July 22 (or 22/7 in day/month date format), since the fraction ⁄7 is a common approximation of π.
Read “Pi Day” on English Wikipedia
Read “円周率の日” on Japanese Wikipedia
Read “Pi Day” on DBpedia
Read “Pi Day” on English Wikipedia
Read “円周率の日” on Japanese Wikipedia
Read “Pi Day” on DBpedia
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