There are 2 Pi days, it all depends on your method of writing the date (day-month-year
or month-day-year). If you you write in the format month-day-year then pi day would
be march 14th, 3-14-current year. This is what most people call pi day. Celebration
of the number 3.14159....Now for those who write the date the correct way, day-month-year, in this case
you would be celebrating pi approximation day 22nd July, 22/7/current year. Celebration of a commonly
used approximation of pi, 22/7. Now if you just love pi and love math, then why not celebrate both.
Pi Day Songs-Come on! join in a round of songs to celebrate this very special day.
The Digit Connection -One of the best sites for pi out there, it is my favourite math website.
Pi-Another pi site with pi poems, and fun pi stuff.
Am I in Pi?--Find your birthday in pi.
Wikipedia Article