The Easter egg tradition comes from the ancient Egyptian celebration of Shemu,
the day following Easter Sunday, which was the season of harvest and rebirth,
when people wrote their wishes on painted eggs and
put them on windows and trees to receive the blessings of
the first rays of the morning light from the sun god Ra.
Early Mesopotamian Christians adapted the tradition by using red stained eggs
to commemorate blood of Christ and the Crucifixion and the tradition spread to
both the Eastern and Western Churches to celebrate the Resurrection.