Bhadrapada (Shasti thithi) is known as Surya Shashti - early moarning prayer to sun god is equal to Ashwamedha Yaga.

 6th day in the lunar month Bhadrapada (Shasti thithi) is known as Surya Shashti. It is highly meritorious to take bath early in the morning on this day, worship Sun God (Surya Naaraayana) and take Panchagavya (a mix of five items related to the sacred Cow). This is supposed to give merits equivalent to Ashwamedha Yaga.