I've been online for 2 events so far, one last night and another last week.. maybe about a week ago or so. Both times they were around 6-8pm EST. I like the idea of knowing which day, but not necessarily knowing what time, or having an idea of the time period (i.e. the event will run at some point between 3-5 or 7-9 or something). Some combination of randomness that ties in with organization so people can plan to try to be around for them a bit more! Especially those who lead busy lives outside of the game and would like to participate!