In my eyes, it's just another day.
The holiday season is no different than any other cycle. You must approach it in this manner or it will become overwhelming.
Chemo is chemo, and the cycle has to eventually begin.
Treatment during the holidays just means you have more time to waste, which may also mean more time with your thoughts, which can be dangerous. You should also consider how lonely it may be, as well as the impact it will have (not only on you but on others).
It's critical to clear your mind and realise that this is just another day, cycle, or period; you can do it. The days seem to drag on forever, but you must persist. It may seem cliche, but your mind is far stronger than you realise. Likewise, you are.
Concentrate on the positives and what you'll be able to accomplish after the cycle is over. It will help you in getting through any difficult phases of the cycle. By persevering, you demonstrate that you are stronger than you believe.
Don't think of it as anything enormous or significant, and don't let others tell you otherwise; simply think of it as nothing special.
Depending on where you are in your journey, you may want to consider postponing your treatment for a few days to let you enjoy the festivities; but, if you're in the same boat as me and the cycle is the penultimate one, you feel compelled to simply get it done. Things don't appear to be that huge in the grand scheme of things.
When I've already come so far, it's worth sacrificing something minor for a shot at longevity.
I'd rather get it done and back exercising as soon as I can.