You get tired. Holidays are especially wearing, and stressful in ways that can’t be fully overcome by the excitement and joy they also offer.
So, what do you do about it? Same as everything else you feel, you accept it and keep moving. The only thing certain about life is that as long as it exists, it moves. It moves forward through time—at a terrifying velocity, sometimes—even when we’re sitting still.
Do small work. Do quiet work. Do deliberate work. Your work doesn’t have to be grand or frenetic all the time, it can move with time, as life moves. This is part of being kind to yourself and respecting both feelings and your practice.