https://www.nasa.gov/mission_pages/asteroids/overview/fastfacts.html

"Only once every few million years, an object large enough to threaten Earth's civilization comes along. Impact craters on Earth, the moon and other planetary bodies are evidence of these occurrences."

https://news.harvard.edu/gazette/story/2021/02/new-theory-behind-asteroid-that-killed-the-dinosaurs/

Last one was 66 millions years ago. We are overdue

So we are not overdue for a planet changing asteroid smacking into the planet?

Eons. I would be worried about a super volcano or an asteroid (statistically we are overdue).

The DOE should just offer cultural days that anyone can take off with notice. If enough of the school system calls out, then the entire system has a day off