If I need to be closed by December 31, what is the last week I can list my Dewees Island house?

Working backward from a December 31 closing on a Dewees Island house, the listing needs to go live with enough runway for showings, an accepted offer, inspection, appraisal, and the closing attorney's title work, all before the holidays slow lenders and courthouses down. Brian maps that exact calendar for a Dewees Island seller once financing and inspection needs are known, rather than guessing at a generic timeline.