Lots of threads about people taking down their decorations to be met with a flurry of "oh no, Christmas only STARTS on the 25th and runs to 6th Jan!"
This wasn't a thing when I was little, decorations always went up around mid-December, down either just before New Year or just after. I don't think I knew anyone who did the 12th night thing, and Epiphany wasn't a word I ever heard anyone use in my church going family. Just not a "thing".
Is this regional? Is keeping your decorations up to 6th Jan a more "English" thing while us Scots, Irish and Welsh are more focused on the new year hoolie? Or is it a Catholic/Protestant tradition thing given that many southern european catholic countries like Italy and Spain traditionally celebrate Epiphany and the three wise men bringing gifts rather than Santa Claus?
YABU - of course Christmas starts on 24th dec and isn't over until 6th Jan
YANBU - starts at some point in December, done and dusted by 27th.