These gentlemen who mow their lawns on a Sunday have no thought for other people who like to sleep in on a Sunday. What should I do?
Gentlemen don’t mow lawns, that job is done by the gardener, so speak to yours and ask him to speak to the others and all do the lawns on Saturday. That’s the simple answer (which won’t work). The other defense is to wear ear protectors when you go to bed, and close the windows and doors. You could also try poisoning the grass, but just don’t get caught.