All servers will be brought offline on Friday, August 7, 2015 at 10:45PM PDT for an unscheduled maintenance.
Servers will be unavailable for approximately one hour for this maintenance.

Keep an eye on the EverQuest forums and social media for status updates and for news if additional downtime is needed.
 
UPDATE: This downtime has been expanded to ALL servers will start at 10:45PM Pacific

There will be some server downtime beginning tonight at 12am PDT. From the patcher:

All EverQuest Live Servers (except Al'Kabor) will be coming down around 12:00 mid PDT (PDT is -7 GMT: 1:00am MDT, 2:00am CDT, 3:00am EDT, 7:00am GMT) on Thursday, October 8, 2009 for a Game Update. The servers are estimated to be down for about 8 hours.