Ekadashi

Jaya and Vijaya Ekadashi

Ekadashi is eleventh day of a fortnight in a lunar calendar dedicated to Lord Vishnu. There are two Ekadashis in a lunar month. The two Ekadashi in the month of Maha are known as 

1. Jaya Ekadashi and 
2. Vijaya Ekadashi 

Upvaas or fasting on Ekadasi day is considered highly beneficial and is observed by a large number of Vishnu devotees.

http://ekadasifast.blogspot.com/