I never start any motors,saws etc before 8 AM and don't use them after 7PM. I am courteous to my neighbors and expect the same out of them. Doesn't matter if there is one neighbor you don't like,there are others to consider too.
That's the way it ought to be ^^^^^^^^^^^^^^^^^^^^^^^^.
I use to do rotating shift work and one night a fellow came to work complaining about his neighbor cutting grass during the day. He said he had asked the neighbor to wait a few hours and let him get some sleep, but the neighbor said it was his yard and he'd cut his grass when he wanted to. Sounds like there might have been other issues, but I'm not sure. So the the fellow I worked with cranked up his mower one morning about 2 am, we had worked 3-11 shift that day. Here come his neighbor, complaining about needing to sleep. Fellow worker told him it was his grass and he'd cut it when he want to. From then on, the neighbor would make sure my friend got his sleep.