It's called Vesak and is understanbly the most important celebration any Buddhist can participate in. Hindus too celebrate Buddha's jayanti tomorrow May 22 as they consider him the 9th avatar of Vishnu. It's difficult not to consider him the successor of the previous avatar, Lord Krishna, when you take the time to carefully examine their recommendations given about twenty-five centuries apart. Especially the fundamental one that urges us to test what they prescribe. Happy Vesak Day!