Vacation time allows you to take extended time off from playing during periods when it is difficult for you regularly make moves, for example holidays, or extended illness.

All users start with 2 weeks of vacation time, and vacation time accumulates at 2 hours per day, until reaching a maximum of 30 days. Each time you go on vacation you use a minimum of 1 day vacation time, even if you return from vacation before 1 day is up. No extra vacation time accumulates while you are actually on vacation.

Sleep time is similar to vacation time, but applicable to shorter times away from playing. The main purpose of sleep time is to allow relatively short correspondence time control games to be played. If you wish to play a game with 24 hours per side, time zone or sleep pattern differences can give one player a big advantage over the other. For example, if a player involved in a 24 hour game goes to bed with 6 hours left on their clock after playing their last move, then their opponent can immediately play their move, and then win on time if the sleeping player sleeps for more than 6 hours. Sleep time allows the first player to go into sleep mode before going to bed, and this would prevent their clock from ticking again until they wake up, at which point, they would return from sleep mode to play their next move.

After you set your state as "Sleeping", none of your correspondence time control game clocks will tick until your sleeping time has run out. You have 10 hours of sleeping to use each day, and once you have started sleeping, you use the entire 10 hours, even if you return from sleep before the 10 hours expires. Once waking up, you cannot go to sleep again for at least another 10 hours, in other words, your available sleep time is zero as soon as you wake up, and does not go back up to 10 hours until at least 10 hours has passed since waking.