From an e-mail I just received:
Back to School Bonanza
and Double XP!!
September 2-5, 2011
Purchase StationCash in-game, via your Station Account, or redeem an SOE Pre-Paid Game Card at http://www.soe.com/gamecards/ (between 12:01am PDT Sept 2, 2011 and 11:59pm PDT September 5, 2011) to get Double StationCash. EverQuest II players also get Double XP during this weekend.
Purchases made via SMS are excluded from the promotion.
That's all StationCash purchased in-game or at SOE.com, or prepaid StationCash cards redeemed during:
- PDT: September 2 12:01am ~ September 5 11:59pm
- EDT: September 2 3:01am ~ September 6 2:59am
- BST: September 2 8:01am ~ September 6 7:59am
- CET: September 2 9:01am ~ September 6 8:59am