Pi Day celebrates the mathematical constant Pi observed
on March 14 (3/14), due to Pi being roughly equal to 3.14.
You can find many references to the term pi in Crystalinks.
I often see the symbol 
in meditation.
It is not to be confused with the Hebrew letter 'Chet'
Study the Hebrew Alphabet on the page posted above.
What letter calls to you. Find it's meaning.
Pi in the Sky Google Images
Pi Crop Circles
