The WoW Team has scheduled four Icecrown Citadel bosses for testing on the PTR throughout October 26-30. Only normal difficulties will be tested for 10-players and 25-players.

The Icecrown Citadel raid test schedule will be very flexible, and can change at a moment’s notice due to build status, bugs, and server issues. Remember that this is the test server, so things can, do, and will break from time to time.
The schedule is as follows:

US Servers

Monday, October 26 at 7PM EDT / 4PM PDT