Happy Pi Day: Happy Aryabhata day
Aryabhata worked on the approximation for pi (\pi) in 499 CE at the age of 23. His work was translated into Arabic (c. 820 CE) this approximation was mentioned in Al-Khwarizmi's book on algebra. Only in 1761 did the European Lambert proved it.
So when you celebrate the Pi day, think of Aryabhata. #piday