Ashunya Shayan Vrat, also known as Ashunya Sayana Dwitiya, is an observance dedicated to Lord Vishnu and Goddess Lakshmi. Ashunya Shayan Vrata is observed in the Shravan month (July – August) in the traditional calendar followed in
North India. In some regions it is observed in the Ashada or Bhadrapad or Kartik Month (November).
It is believed that those who observe Ashunya Shayan Vrat will attain material progress and prosperity. A story mentioned in the Narada Purana narrates how a poor man was born as King in his next birth as a result of performing Ashunya Sayana Dwitiya Vrat.
Ashunya Shayan Vrat is observed during different time in a year. It is usually observed on the first or second day of Krishna Paksha (waning phase of moon) in Ashad or Sawan or Bhadrapad or Kartik Month.