All U.S. servers will come down at 7am PDT on Tuesday, April 17, 2012 for the Game Update 63 patch. EU servers will have their downtime at 5am London Time on Wednesday, April 18, 2012. Estimated downtime for both regions is five hours.
Patch notes are now available on our Game Update 63 wiki page. Links to all content we covered is also available on that page. Be sure to check out our previews as well!