A festival in honor of the rivers.

When Jupiter (Brihaspati) enters a zodiac sign that is connected to a river, Brahma, Vishnu, Shiva, Indra and all other gods gather there for twelve days.

Pushkara is a son of Varuna. He asked Brahma to be allowed to be present in all holy waters and became the protector of the bathing places in holy waters, Tirtha.