Event Summary: Important maintenance will be performed on one or more devices that may affect network connectivity to your services. Configuration updates will be applied that may affect traffic into the network in NY/NJ causing higher than normal latency or brief periods of packet loss.
Start time: 2 AM EST (7 AM GMT)
End time: 3 AM EST (8 AM GMT)
However it's unclear if they include daylight saving's time (EDT), so add an hour to those to be safe.
Update: It should be finished now.