1Decorating the tree on Christmas Eve
2Taking awkward family photos for Christmas cards
3Buying / making / eating fruitcake
4Ridiculously-extended holiday sales events
5Listening to modern Christmas songs like 'All I Want For Christmas Is You' and 'Last Christmas'
6Vacationing over the holidays
7Decorating with white lights and minimal colour
8Unnaturally-coloured Christmas trees
9Giving underwear as a legitimate gift
10Doing "Secret Santa" at work
11Setting up Christmas decor weeks before Thanksgiving
14The Christmas crackers at dinner
18Holiday movie specials being played all the time