Ratha Saptami or Magha Saptami occurs in the
month of Magh as per the lunar calendar. Ratha Saptami occurs on the seventh
day of the waxing phase of the moon or on the sukla paksha Saptami of the Magh
Month.Ratha is a Sanskrit word which means Chariot.
Saptami means the seven. Since on the day of Magh Saptami it
is believed that the sun god would turn his chariot in the definitive North
direction this day is popular by the name of Ratha Saptami. It also marks
the birth of Surya and hence celebrated as Surya Jayanti.