Vat Purnima or Vat Savitri Puja is a well known Hindu festival which is celebrated on Poornima (Full moon) day in the Hindu calendar month of Jyeshtha.
The Vat Savitri Puja Vrat is observed by Hindu married women for the prosperity and longevity of their spouses. This festival is generally celebrated in Gujarat, Maharashtra and some parts of Southern India.
In 2012 Vat Purnima will be celebrated on 4th June 2012.
The Vat Savitri Puja – Vat Purnima festival is celebrated in honor of Savatri, the wife of Satyavan who brought her dead husband back to life.
Special players and pujas are carried out by married women on this day. They observe a fast on this day from sunrise to sunset and worship Savitri as the Goddess. They visit banyan (peeple) trees, pour water on the tree and go around it 108 times tying a red thread around the bark of the tree praying for their long conjugal life. This ritual is known as Peepal Puja.
Basically it is a three day festival and earlier married women used to fast for 3 days. As per that three day system, Vat Savitri Vrat begins on 2 June and ends on 4 June.