From the host, NFO Servers:
The machine hosting your service is one of those that we will need to physically move between 10pm EDT on 5/2 and 10am EDT on 5/3, or between 10pm EDT on 5/3 and 10am EDT on 5/4. This means that during one of those two periods, we will need to turn it off (which we will instruct it to do gracefully), disconnect it, load it into a truck, drive it to other facility, place it into the new rack, connect it back up, and turn it back on.
We are splitting up this work into two days to try to keep the downtime to a minimum on each of them. The total downtime for your service as a result of the move will likely be at least a couple of hours, but less than the full 12 that we are allotting for the maintenance — we are expressing a large window in case the move has to be delayed or takes longer than anticipated