Gautam Buddha was born on a Baisakhi Purnima, received enlightenment on a Baisakhi Purnima and attained nirvana on a Baisakhi Purnima.
Significance of Baisakhi Purnima in the life of Buddha

Gautam Buddha was born on a Baisakhi Purnima, received enlightenment on a Baisakhi Purnima and attained nirvana on a Baisakhi Purnima.