Most of our religions are based on the stars, moon and planets. In particular is our Sun, that seems to all but die in winter, as does the life giving vegetation with it, as the days get very short, especially the further north you go in the northern hemisphere. Jesus represents our Sun. The death of our Sun is on Dec 22 in the northern hemisphere. It is 3 days later that the days begin to become noticeably longer again (birth/rebirth of our Sun). Come Spring time on Easter, the daytime becomes longer than the nighttime, signaling the Sun has defeated the death of Winter. In this case, the Sun/Son did not have to die it is simply part of our seasons due to the tilt of the earth and our path around the Sun. Humans simply personified these stories where Jesus is the last of many God/Man Saviors of the world that are really saying without our Sun we would perish. Ironically our Sun is the Light of the world.