 There is historical evidence that by the middle of the 4th century the Christian churches of the East celebrated the birth and Baptism of Jesus on the same day, on January 6 while those in the West celebrated a Nativity feast on December 25 (perhaps influenced by the Winter solstice); and that by the last quarter of the 4th century, the calendars of both churches included both feasts.The earliest suggestions of a feast of Baptism of Jesus on January 6 during the 2nd century comes from Clement of Alexandria, but there is no further mention of such a feast until 361 when Emperor Julian attended a feast on January 6 in the year 361.In the Christian tradition, the Christmas season is a period "beginning" on Christmas Day (December 25).