It depends on the season and the show. A standard day would be starting anywhere from 7 am to 12 am, and ending at 1-3 am. Though the other night it took us till 4:30am, then up at 7-12 to do it again. Its not uncommon for us to finish at 3, have a few beers and such, and crawl into our fav sleep spot for a few because the next show is coming in at 7.
I can do 3 to 4 days in a row like that without a break. Oh to be young when I did it 20-30 days in a row.
The Opera crew does that for the 3 months of the season. It's a young person's job that opera stuff.
Shop work (building sets and such) and maintenance stuff is your basic 8-5 with an hour off for lunch. (We have to be feed every five hours, they can either give us an hour off the clock, or provide lunch in which case we get 1/2 hour on the clock.
Movies tend to 12-16 hour days (before dawn to after sunset - its the light thing), 20 days straight. Movies are hard, but when you get done you have a might check waiting for you after you get up from your 2-3 days of sleeping.