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BIG BAD WOLF: If that hour is up, and vacation day is set - does the vacation day add just 1 hour or a full 24 hour day to the game? If it's just an hour, if for some reason they have to leave quickly, they could easly go through a lot of vacation days in just a few hours.
Considering you don't get another 7 days if your time is up in a tournament with a 7 day time limit when you use auto-vacation, I'd be surprised if you only get another hour if the time limit is set to 1 hour.