Before Anniversary Era AVs popped 7 days a week during AV week. No discord or coordination required.
Oh I thought you meant some kind of timed event where the clusters all logged on for AV.
Speaking of anniversary, I am wondering if the influx of people will be enough to start popping again. A lot have farmed it out already, to be honest, and their mentality behind AV is definitely not what was on Era last night.