Einstein may have used pi (Ï€)in his equations but he had no involvement in the creation or application of pi.
Pi had been found over 2,000 years before Einstein was born.
No
he created it
I think the question would more correctly be posed as "why did the United States, decide to celebrate Pi Day on Albert Einstein's birthday?" Pi Day was started by Larry Shaw in 1988. Einstein was born in 1879 and died in 1955. (He was already dead when Pi day came into existence, so there is no way he could have been born on Pi day.) See the related links below for additional information.
he created it
Yes he did he always loved PI hahah lols
albert Einstein
no, it was William Jones. Albert Einstein founded E=MC2.
yes
Albert Einstein
pi, 3.14159265358979
einstein