The annual Navratri Brahmotsavam celebrations 2015 in Tirumala Tirupati Balaji temple will begin on October 13, 2015 and end on October 22, 2015. During the nine-days of the Brahmotsavams, Sri Venkateswara will be taken in procession around the temple in different Vahanas (special decorated Vehicles based on Vishnu legends). There will be special Unjal Seva during the period.
October 13, 2015 – Dwarjarahanam (Morning) Pedda Sesha Vahanam (Evening)
October 14, 2015 – Chinna Sesha Vahanam (Morning) Hamsa Vahanam (Evening)
October 15, 2015 – Simha Vahanam (Morning) Muthyapu Pandiri Vahanam (Evening)
October 16, 2015 – Kalpa Vruksha Vahanam (Morning) Sarva Bhoopala Vahanam (Evening)
October 16, 2015 – Mohini Avatharam (Morning) Garuda Vahanam (Evening)
October 18, 2015 – Hanumantha Vahanam and Swarna Ratham (Morning) Gaja Vahanam (Evening)
October 19, 2015 – Surya Prabha Vahanam (Morning) Chandra Prabha Vahanam (Evening)
October 20, 2015– Rathostavam (Morning) Aswa Vahanam (Evening)
October 21, 2015 – Chakra Snanam (Morning) Dwaja Avarohanam (Evening)
More information about various Vahanas during Navratri Brahmotsavam can be found in this earlier article.