Vacation mode should actually...vacate...the future stream schedule up until the day the streamer expects to return.

When the vacation is for one day, saying "Bob will return in X hours" would work better if it calculated based on the next scheduled stream time (if one exists) rather than based on midnight of the day after the vacation ends. Saying I'll return in 14 hours when my next stream would actually be in 36 hours is rather confusing.