Swami Vivekananda (1863-1902 C.E.) was a Hindu monk and saint of India. According to the English calendar he was born on 12th January 1863 into an aristocratic Bengali family of Calcutta. However his birthday is celebrated according to the Hindu calendar and this day is known as Swami Vivekananda Jayanti. Vivekananda was born on Krishna Paksha Saptami after seven days of Paush Purnima. As Jayanti day is decided based on the Hindu (lunar) calendar, it is not fixed on the Gregorian calendar.