Tranquility reboot on Monday, December 1 (http://community.eveonline.com/news/newsFromEve.asp?newsTitle=tranquility-reboot-on-monday-december-17)
17 December 2012, 12:15 pm
The Tranquility server will go offline at 12:20 UTC for an emergency reboot. We expect this downtime to be brief and will aim to open the server at 12:35 UTC. We apologize for any inconvenience and thank you for your patience during this time.
Source: eveonline.com | news from EVE (http://www.eveonline.com/)