Somvati Amavasya, or Amavasi is the new moon day or the no moon day that falls on a Monday (Somvar). Next Somvati Amavasya is on October 12, 2015. From sunrise on October 12 to 3:55 AM on October 13. (This year it is highly auspicious as October 12 is Mahalaya) The significance of Somvati Amavasya was explained by Bhisma to Yudhishtra in the Mahabharata. It is said that who ever takes a dip in the important rivers on the day would be prosperous, free of diseases and would be free from grief and sorrow.
It is also believed that by taking a dip in the holy rivers the soul of ancestors will rest in peace.
Married women take the holy dip for a happy family life and for the long life of husbands. They also worship the pipal tree.
Somavara Amavasya Vrata (fasting) is observed for a long and happy married life.
Many devout Hindus also fast on the day and some people only have a single meal.
On the day thousands of people take a dip in
Ganga at Haridwar, Triveni and other places.