The Everfrost and Butcherblock servers are having some downtime overnight. Roshen posted on the official forums:

Both the Everfrost and Butcherblock servers will be brought offline on Thursday, February 19, 2015 at 4:00AM Pacific for server maintenance. This server is estimated to be unavailable for approximately four hours.

Keep an eye on the EverQuest II forums and social media for status updates and for news if additional downtime is needed.

Here's our handy time zone conversion tool to help you plan.