Our IT guys at the office:
"On Thurs. 12/22, the work server will be down from 12:00 to 1:00 p.m."
Translation:
"On Thur. 12/22, the work server will be down from 12:00 p.m. to 6:30 p.m., and then intermittently on 12/23 from 8:00 a.m. to 4:45 p.m. It will likely be very slow when you return from the Christmas holiday, and on 12/27, it will be down again from 9:30 a.m. to 3:00 p.m. If you experience any difficulty after this date, we will have to take the server down again."