Pi Day different from Pi Approximation Day
Alternative dates
Pi Day is frequently observed on March 14 (3/14 in the month/day date format), but related celebrations have been held on alternative dates.
Pi Approximation Day is observed on July 22 (22/7 in the day/month date format), since the fraction 22⁄7 is a common approximation of π, which is accurate to two decimal places and dates from Archimedes.Two Pi Day, also known as Tau Day, is observed on June 28 (6/28 in the month/day format).Some also celebrate pi on November 10, since it is the 314th day of the year.
not same as not identical to distinct from separate from unlike