From Hindupedia, the Hindu Encyclopedia

By Swami Harshananda

Upavasatha literally means ‘to dwell near,’ ‘to fast’.

A Vedic sacrificer is expected to fast and keep vigil before beginning the main rite. This fasting and the day of fasting is known as upavasatha. On this day, preliminary matters like preparation of an altar, fetching of the yupa[1] etc., are attended to.


  1. Yupa means sacrificial post.
  • The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore