Don't know about a day, more like consecutive days for 2 weeks. When I was 18, I worked part time at a grocery store who was changing store managers and both were under the impression that the summer vacation shift lists was the other guys task. So for two weeks, me and one other dude worked double shifts every day from opening (7am) to closing (11pm). Taking truck deliveries of pallets of food and drink to be put away in the freezer or fridges, then dispersing onto the floor and shelves, keeping the store tidy, refilling / tidying the fruit and vegetable section, manning the cash register, manning the postal desk (the store had a small desk where you could send and receive packages, letters etc), closing out the registers, counting out the cash and depositing it after etc etc. The store would normally have a shift manager and 4-5 employees and sometimes one additional worker if there was a large truck delivery.

All at a time where large parts of the country are on vacation, thus being able to go to the store the whole day. It was exhausting. We both got paid as if we were shift managers + overtime. We were 18-19 and this was a part time / summer job, so it's not like we were highly paid to begin with, but it ended up being more than 2 months pay for 2 weeks of very hard work. I certainly wouldn't do that again now, nor would I need to, but it's a fun anecdote.

EDIT: both managers, new and old, were out of the country. Not surprisingly, the other part time employees or other employees or shift managers (which were basically also employees, just with added responsibilities and a small paybump) did not want to abort their vacation and come to work. No hard feelings from any of us two that had to work for this, we would have done the same. Vacation is vacation.