As noted in the official patch
3.3.5 notes, (
http://www.worldofwarcraft.com/patchnotes/ ) the release of the Ruby Sanctum was briefly delayed to better align its availability across all regions.
We’re happy to announce that the wait is over, and the Ruby Sanctum is now open. To learn more about this exciting new raid dungeon, please visit the
Ruby Sanctum preview page.
http://www.worldofwarcraft.com/info/underdev/3p3/rubysanctum.xml