Indeed, Christmas has a complex history that traces back to pagan traditions. In the 4th century AD, the Christian Church established December 25th as the birth date of Jesus Christ, which coincided with the pagan celebrations of winter solstice. This decision was made to convert pagans to Christianity and integrate the two traditions into a unified holiday. The customs associated with Christmas, such as decorating trees and giving gifts, can be traced back to pagan rituals celebrating the rebirth of the sun god and the harvest season.