When will the next event be?

It's not been concretely decided yet. We'll let people know. :)

Do we have one each month, or is it a holiday thing, or just randomized?

That just means it's going to be a long time! ):

Oh gosh I hope you're not serious Illusion!! D:

You typically have two or three a year but they last for around a month if it is a currency event.

He's not completely serious. He's just cynical. The next event isn't going to be for a while, that much is true, but we'll make an announcement once we've got the schedule figured out.