Sita Navami is celebrated as birth anniversary of Goddess Sita, wife of Lord Rama. This day is also known as Sita Jayanti. Married women observe fast on Sita Navami and pray to seek long lives and prosperity of their husbands. Sita Jayanti is celebrated on Navami Tithi during Shukla Paksha of Vaishakha month. Watch here Jyotishacharya Ajay Dwivedi ji narrating the katha and importance of Sita Navami.