December is when regular practice quietly stops for a lot of people, and it does not stop because of a decision. It stops because a week gets busy, then another one does.
The all-or-nothing trap
The people who lose December are almost never the ones who cut back. They are the ones who decide that a twenty minute practice does not count, skip it on that basis, and then have nothing.
Twenty minutes counts. One class a week counts. Turning up tired and doing half of what you would normally do counts, and it counts far more than the excellent session you did not do.
What to protect
If you are going to defend one thing this month, defend frequency over duration. Three short practices beat one long one for keeping the habit alive, and the habit is the thing under threat in December, not your flexibility.
What to let go
Intensity. This is not the month for the hardest class on the timetable, and there is no prize for arriving at January exhausted.
This is exactly what I keep restorative work for. It asks very little and gives back a disproportionate amount when you are short on sleep and long on obligations. So does Qigong, which you can do at whatever effort you walked in with.
Visitors
You are here in my busiest weeks and you have probably not practised for a fortnight because of the flights and the family. That is normal. Come to me for something easier than your usual level first and you will enjoy the rest of the trip more.
The one that matters
Go this week. Not in January. The version of you that starts again in January is going to have to work considerably harder than the version that never quite stopped, and you already know which one you would rather be.