I don't do anything Advent or Christmas related until December bar adding to savings.
Observe Advent. Go to church on the four Sundays before Christmas. We have a Grimm's Advent spiral, the Kindness Elves, Mary's Star Path and Book Advent calendars. I try to read and reflect every day. A poem, literary excerpt, bible verse, etc. Focus the children on what presents they are giving rather than receiving.
Only one room decorated for Christmas. Tree up on last Sunday in Advent. Christingle Service on Christmas Eve. Celebrate Christmas from Christmas Day until Twelfth Night. Add Jesus to crib scene after bedtime on Christmas Eve and leave out until Candlemas. One gift & stocking from FC.
Celebrate Twelfth Night. Bake a cake, hyacinth pot in place of the tree to symbolise the approach of Spring, play games, etc. This year we are going to a Wassail bonfire at a local orchard on the 6th.
Make plans for the rest of Winter - Burns' Night, ice skating, ski-ing, ice wreaths, Big Birdwatch, read Winter themed books (children & adults), read seasonal poetry (Faber & Faber just republished some Ted Hughes books), Nature Detectives Winter Activities for the children, start eating the Winter menu which is about eating local, seasonal produce.