Next to Pascha, the Nativity of Christ is the most joyous festival, and may justly be called the "Winter Pascha." The celebration of the Nativity of Christ was established very early, possibly already in the first century. But until the end of the fourth century, the Nativity of Christ was celebrated with His Baptism on the 6^th of January (the 19^th according to the New Style) and was called Theophany.