You may ask, "But, Robin, why aren't all the dates covered in that calendar over there? [points to the right sidebar]" Well, I'll tell you. The new Mists of Pandaria battlegrounds have already been scheduled on the in-game calendar, even though they won't be introduced until September 25.
We are currently showing only the BGs that can be played right now, but we are also showing when the Temple of Kotmogu and the Silvershard Mines will be the Call to Arms BGs after launch.
You can always verify the current schedule by viewing the in-game calendar. Just make sure the Battleground Call to Arms filter is selected from the filters dropdown menu at the top right of the calendar.
It's open warfare between Alliance and Horde in Mists of Pandaria, World of Warcraft's next expansion. Jump into five new levels with new talents and class mechanics, try the new monk class, and create a pandaren character to ally with either Horde or Alliance. Look for expansion basics in our Mists FAQ, or dig into our spring press event coverage for more details!