Only one room is Christmassy.
Very few 'activities' in the run up.
No scheduled visitors bar neighbours bearing gifts and treats to the door.
Low-key Christmas meal, same as last year.
Only one source of noise at any one time: radio, Alexa or TV.
Gifts only from lists, no surprises.
Present opening in intervals over Christmas Day, if necessary into Boxing Day.
All wrappers, paper and ribbons tidied away as soon as opened.
All gifts straight into each recipients' individual 'Christmas gift bag' (a large handsewn, sturdy, boxy bag in Christmassy fabric) to keep space uncluttered.
Christmas is generally quite well tolerated as it is repetitive and predictable.