The second Double XP event for Battlefield 3 will be starting this weekend, so get that trigger finger ready. It begins Saturday, June 16, though late Friday if you're on the west coast.
The event applies to everyone, not just Premium members, though if you are Premium, you'll get extra points on the Close Quarters maps, too.
If you really want to exploit this event (tsk tsk), I'd say go for Conquest Domination rounds and vehicle heavy Conquest maps, if you're good in vehicles.
Times are below.
Wait! What time does the event start where I live?
Consult this handy chart!
Los Angeles: 00:01 June 16
London: 8:01 AM June 16
Stockholm: 9:01 AM June 16
Tokyo: 4:01 PM June 16