Easter eggs are special eggs that are often given to celebrate Easter or springtime. As such, Easter eggs are common during the season of Eastertide. The oldest tradition is to use dyed and painted chicken eggs, but a modern custom is to substitute chocolate eggs, or plastic eggs filled with confectionery such as jelly beans.
Eggs, in general, were a traditional symbol of fertility, and rebirth. In Christianity, they symbolize the empty tomb of Jesus: though an egg appears to be like the stone of a tomb, a bird hatches from it with life; similarly, the Easter egg, for Christians, is a reminder that Jesus rose from the grave, and that those who believe will also experience eternal life.