The Greek god Attis, born of the Virgin Nana, (or sometimes Cybelem) on December 25 and was reborn and rose from the dead on the third day. Attis was both the Father and the Divine Son. His crucifixion and subsequent resurrection were celebrated annually, with ritual communions of bread and wine. The wine represented the God's blood; the bread became the body of the savior.
Adonis born on December 25 was son of the virgin Myrha. Hermes born on December 25 was the son of the virgin Maia, as well as a member of a holy trinity Hermes Tris-Megistus. The god Dionysus, born on December 25, turned water into wine. Bacchus, born on December 25, was crucified in 200 BCE. Prometheus, born on December 25, descended from heaven as God incarnate as man, to save mankind, and was crucified, suffered, and rose from the dead.,
Jesus was based on those earlier gods. Christianity evolved from earlier religions and this is why you will find so many similarities to pagan beliefs. Also, those pagan beliefs were based on what the earlier civilizations observed in space, especially the sun.