Pace (Lancashire dialect for 'Peace') Egging is at Easter, traditionally, Souling (or soul caking) is on All Souls Day (November 2nd), and Mumming is done around Christmas.All the plays last around 10 minutes (on average), and are basically Knight George slaying the Turkish Knight (or similar), and the Doctor revives him.
See JJ's posting re. Warburton Soulers: