I have cut the meal down to basics, turkey, ham, stuffing, sprouts, roast potatoes and gravy, no other veg, bread sauce or anything fancy. I then prepare the whole meal, bar actual cooking, on Christmas Eve, starting at 3.00 so that I can listen to the service of nine readings and carols form Kings College. the turkey gets put in the oven on the delayed timer so that it can start cooking without me worrying about remembering to do it.
Nevertheless even this planning can still end in disaster. One year when PiL were alive I prepared the turkey in the morning as DH went off to collect his parents, who didn't drive and they arrived earl afternoon. When I defrosted the turkey I thought the skin was slimy and it smelt, but DH said I was worrying unnecessarily and it was OK. As there was no room in the fridge and it was cold I put it in the garden shed to keep cool. PiL arrived, MiL went out to inspect the turkey and came flying back, it stank to high heaven and had blow fly.
It was 3.00 on Christmas Eve in the mid 1970s. DH and I put turkey in boot and drove immediately to shop where we had bought it. DMiL walked straight to local butcher, he had no turkeys left but she bought a pair of pheasants. The shop was mortified, they had bought one batch of frozen turkeys that were not from the usual supplier and mine was the fourth brought back. They were in the process of closing when we arrived and had one uncollected turkey left, which they gave us.
We then had to defrost the turkey fast. It involved up ending in a bucket and regularly pouring very hot water around it and inside it. We succeeded in defrosting it thoroughly in three hours and Christmas lunch then went on as usual. We ate the pheasants on Boxing Day.