In the Northern Hemisphere of course Easter and the Spring Equinox occur around the same time - unlike here in the Southern Hemisphere, however as much of the symbolism used in the Christian festival actually stem from this older Pagan festival, this rather lengthy article investigates the origins of such rather fully.
The Myth of the Easter Bunny
by Joan Katherine Webster
Rabbits dont lay eggs. Particularly male rabbits, the traditional gender of the Easter Bunny. Yet every Easter we buy bunnies with eggs. We send children to find hidden eggs laid by the Easter Bunny. Why?