http://www.whitehouse.gov/easterEggRoll
a reference to the resurrection of Christ.
Eggs rolled across a lawn or a meadow
or sometimes up or down a hill
in order to respresent the rolling away of the stone that sealed Christ’s tomb.
The White House Easter Egg Roll is an annual tradition dating back to 1878
and President
Rutherford B. Hayes .
It is one of the largest public event at the White House.