From the Events Calendar for April:
|Darkmoon Faire (Elwynn) April 10 - April 16|
|Noblegarden April 16 - May 20|
|Call to Arms: Arathi Basin! April 7 - April 10|
|Call to Arms: Alterac Valley! April 21 - April 24|
|Call to Arms: Warsong Gulch! April 28 - May 1|
During a Call to Arms, emmissaries from that Battleground will be found in the major cities, and honor/faction rewards for performing objectives in that battleground are increased.