Surya Jayanti, or Surya Jayanthi, is a festival dedicated to Lord Surya, the Sun God in Hinduism. The festival is popularly known as Ratha Saptami. It is observed on the seventh day (Saptami) of the Shukla Paksha (bright fortnight) of the month of Magha Masam (January – February). The corresponding Tamil Month is Masi or Thai. In 2018, the date of Surya Jayanti is January 24.
Surya Jayanti is believed to be the day when Lord Surya appeared. The day is also observed as Magha Saptami.
Tirumala Tirupati Balaji temple conducts special pujas are rituals on the day.
Prayers dedicated to Lord Surya like the Aditya Hridayam is chanted on the day. It is a major event in
South India for certain Hindu communities in Andhra Pradesh and Tamil Nadu.