I didn't see any announcement over here, but there was on the EU forum.
The bonus xp times were published wrong and it ended at 9am PDT as it should have.
However, it was turned back on from 13:00 to 22:00 by way of apology.
Ah, that's what it was. Thanks. My alt was not able to meet the target level, until the extra 100% came on and then he did. I love bonus XP.
I am sure there are several threads thanking Frogs for extra bonus XP time. Lemme check... nope. Still the same whining and spoiled child attitude that we usually see. Probably little more inane than normal.