Stocking first thing.
We have Mass, a load of family visits and calls to make, and getting the turkey on.
When we get home from the visits, we first turn on the oven and throw in a tray of M&S nibbles, getting the turkey prepped and fire lit etc. Once we have the turkey in the oven, things in the kitchen organized (not a load - maybe turning on spuds to parboil, or wiping down after the last lot of prep work - we do it all in stages on 24th and 25th not all 1 slog), and the fire crackling, we pour a glass of something nice, take the nibbles with us, and start into the pile under the tree.
That's usually at about 4ish, just starting to get dark, kind of time. We might have to get up and do something in the kitchen to break up the session, for 10 minutes, and then continue.
There's then about an hour or more to relax, finish gently organizing dinner, set the table etc, before we eat. Then relax for the rest of the night (other than stripping the turkey carcass and putting the bones in the slow cooker for making stock on 26th).
It's all very relaxed and genial. DD has had a few things in/with her stocking, we have a nice breakfast, and then we are out and about, and have a very short time being busy, before we get to open them.