So i have been playing for only a couple of months and i have not endured the wait as long as you have. Still, it sounds like it has been a long time coming.

Maintenance Period
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　 December 28, 2015 (Mon) 2AM ~ December 28, 2015 (Mon) 5AM (EST) (Estimated Completion Time)

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Maintenance Details
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Limited Time Event
- The Urgent Mission "Gold Rush!" begins

YOU HEARD IT HERE FIRST!