On the fourth day of Brahmotsavam, in the morning Kalpavriksha Vahanam seva and in the evening Sarvabhoopala vahana sevas are celebrated. In 2017, Fourth day of Navaratri Brahmotsavams date is September 26.
The fourth day starts with kalpa vriksha vahan in the morning. Kalpa vriksha is the celestial boonbestowing tree of heaven. All our wishes are fulfilled instantly by having darsan of Lord, the supreme boon giver in this vahanam.
In the night we see Lord in ‘sarva bhoopala vahanam’. Lord’s alankaram is done as ‘Kaliya Mardana Sri Krishna’-Lord Sri Krishna dancing on the hoods of Kaliya, the fiery serpent.