Eggs are a potent symbol of life, renewal and rebirth dating back millennia. The egg was adopted by early Christians as a symbol of the resurrection of Jesus Christ on Easter. The hard shell of the egg represents the tomb and the emerging chick represents Jesus, whose resurrection conquered death. The tradition of eating eggs on Easter is tied to Lent, the six-week period before Easter during which Christians traditionally abstained from all animal products, including meat, dairy and eggs. Since chickens continue to lay eggs throughout Lent, people would hard boil the eggs, decorate them and save them for Easter. The modern tradition of eating chocolate eggs at Easter is a fun, kid-friendly twist on this ancient religious ritual, which originated in Europe during the early-19th century.
Answered by Dave Roos.