Hopefully for my birthday. I'll ask and get back to you.

Given the fact that they seem to do them once every two months on average, and that the last one was 3 weeks ago, I'd say the next weekend will be near the end of October, probably for Halloween, unless they make an exception to compensate for any server issues between now and then. This is just guessing though. I have no genuine information.

This is pretty accurate. Holidays and large chunks of downtime is when you will see double exp. And they always give advanced notice too.

After the outage yesterday, they are thinking of compensation. Might be 2x exp