Its from pegan origin. The egg represents new beginning or new season. The rabbit represents new birth, sort of a reproductive symbol. The new year is actually in Spring, not in mid winter as it is celebrated today. Winter represents the end or death of the year, while Spring, represents new life as everything from the plants to the animals come back to life. They changed it many years ago for marketing and religious reasons. New years eve and day are actually celebrating death. Not many people know this, however.