of the fuller All-Hallows'-Even ("evening"), that is, the night before All Hallows' Day . [ 10 ] Although the phrase All Hallows' is found in Old English ( ealra hālgena mæssedæg , mass-day of all saints), All-Hallows-Even is itself not attested until 1556. [ 10 ] (... from Wikipedia on 2012-04-17 05:03:07)