is it a subjective thing?
When is mad Friday this year? Does it depend on location (eg if the town's biggest employers all "break up on 16th then Mad Friday in that town is 16th whereas elsewhere it's 23rd?).
Or is it widely accepted to be the same date by one and all? Are you all breaking out the Santa hats (euphemistically if not literally) on Friday 16th or holding off until Friday 23rd?