Remembrance Day

On the 13th of Nachgeheim, many folk leave out offerings of meat for Morr’s crows in memory of the Night of the Restless Dead in 1681, when thousands of graves across the Empire erupted with the walking dead who terrorised the living. It is believed that Morr saved the Empire from utter destruction, for by sunrise the horror was inexplicably over.

Source
pg. 31
 * Warhammer Fantasy RPG 3rd ED -- Signs of Faith