http://www.aionsource.com/forum/aion-discussion/102962-upcoming-double-experience-weekend.html#post2035418

Greetings Daevas,

Who’s ready for another Double Experience Weekend?! That’s right! It’s time to once again stock up on caffeinated products in preparation for a weekend without sleep. This Friday, January 22nd, at 8pm (server time), we will enable double experience. The experience bonus will run through the weekend before ending on Monday at 8am (server time).

To put the start time into context, we’ve broken down what time the double experience will start on each server. Plan accordingly and enjoy the double experience!

East Coast Servers – Start Time is 8:00pm EST
Israphel, Zikel, Triniel, Lumiel, Meslamtaeda, Azphel, Marchutan

West Coast Servers – Start Time is 8:00pm PST
Siel, Vaizel, Kaisinel, Yustiel, Ariel, Fregion,

Oceanic Server – Start Time is 8:00pm AEST

Another Double xp coming up Valentine's day weekend.