Not only that these events don't occur often, even when there is some and you don't make it (for example yesterday I didn't see any message, nobody told me and suddenly on mumble I hear people talking about being on the event) you can only say bye bye to that event. I don't know, is it really such a problem to announce it like one day before any event starts?
It would be good if there was possibility to enter the map anytime, like alternative to Hinkley.
Lags hard enough with just the people who happen to hear about it, would be even less playable if they gave advance notice.