It's after 9:30, a reasonable bedtime for most children. Your neighbor decides to mow and weed whack his lawn, then use a leaf blower to clear his driveway and sidewalk. This isn't an occasional thing. What would you do?
We have noise here later than that in most nights. I just let it go unless it's a party with blaring music until 2 in the morning.
I have to put up with it every Friday when I'm trying to sleep after getting off work in the mornings...I also do stuff at night. Not mowing but running a table saw nail gun stuff like that. It doesn't bother the wife or my kids.