I hope you have had a terrific PI DAY! If you didn't get enough today, here are some Alternate Pi Days and Pi Approximation Days. (borrowed)
March 4: When 14% of the 3rd month has elapsed.
July 22: When 22 is divided by 7, it equals 3.14.
April 5: When 3.14 months of the year have elapsed.
November 10: The 314th day of the year (November 9 in leap years).
April 26: The Earth has traveled two radians of its orbit on this day (April 25 in leap years).