US servers will be brought offline on Tuesday, October 21, 2014 at approximately 7:00AM PDT, with an estimated downtime of one hour. EU servers will be brought offline at approximately 5:00AM London Time on October 22. Estimated downtime is 2 hours.
IMPORTANT NOTE: SOE has also announced a two hour downtime for all their systems starting at 5:00am PDT on the same day. Patch notes are available after the jump.