Wow, you are lucky! In my experience, a lot of people find the holidays stressful because there seems like there is so much to do. Maybe that's just an American phenomenon? I'm not sure. The American Psychological Association released this information on holiday stress: https://www.apa.org/news/press/releases/2006/12/holiday-stress.pdf
This stress is largely self-created. We schedule too much for ourselves to do during such a short season. But it can also stem from money struggles or family issues. Whatever the cause, our stress ends up affecting our children in a negative way. When that happens it translates into negative behaviors in our children which then add to our stress and frustration. It's a vicious cycle. That's why I feel it's important for us to remember how our children are affected so that we can interpret their behaviors correctly and respond appropriately, rather than with unnecessary harshness or punishments. Thanks for taking the time to read and comment!