The holidays are a fun and joyous time but also a very busy one, and holiday stress and anxiety in children can and does happen. During the holidays, there are lots of fun activities and events going on, both at home and at school. And while that can be a good thing, the reality is that all that hustle and bustle means schedules are often out of whack, bedtimes get pushed back, and routines are disrupted. As a result, it’s inevitable that kids may feel some degree of holiday stress.
I read this great article and it give you specific ideas how to help your children enjoy the holidays by keeping to a schedule, feed them regularly, don't overstimulate and don't over do the activities.
This is a good read: https://www.verywellfamily.com/holiday-stress-and-anxiety-in-children-620516