Board Thread:Plants vs. Zombies 2: It's About Time/@comment-24858760-20141228101521/@comment-25681536-20141229150012

I think you have changed your time or region. But it should work again later, after several days.

But if not, here is what you can do. Open PVZ2. Then advance your time, at least for a day, Go back to PVZ. close your PVZ2. Then return your time to proper time by setting it automatically. Open agan your PVZ2. Remark: This does not work 100%. Just try it.

Hope you can fix that. Or wait for the next update.