Religious observance falling on the
eleventh day (ekadashi) of the dark
(waning) half of the lunar month of
Kartik (October–November). As with all
the eleventh-day observances, this is
dedicated to the worship of the god
Vishnu, on this particular day in his
form as Krishna. As with most Hindu
festivals, Rambha Ekadashi requires that
certain rites be performed. These rites
involve fasting (upavasa) and worship,
and promise specific benefits for faithful
performance. This ceremony is named
after Rambha, a famous apsara or celestial damsel. Its charter myth tells how, by
faithfully observing this rite, a certain
king was born in heaven and served by
Rambha and other apsaras.