Ratha Sapthami is the day dedicated to the worship of Sun God and observed throughout India in different names derived from several local traditions — religious, ritualistic and symbolic. The rituals vary from region to region. Ratha in Sanskrit means chariot. Sapthami in Sanskrit means the seventh thithi. Ratha Sapthami is the seventh thithi after the Amavasya (new moon) thithi in the month of Thai (mid January - mid February) in Tamilnadu and Magh in Northern India.