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.
Pushkaram is a festival in honor of 12 rivers – Ganga, Yamuna, Narmada, Godavari, Kaveri, Sarasvati, Tamraparni, Brahmaputra, Indus, Pranahita, Krishná, Tungabhadra.
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.