Why thou? Won't most people be free on weekend as opposed to Monday? Why so many of your members can only do it on Monday? I mean one or two with a weird job schedule, sure, but an actual large portion?

At this point, as most group are done capturing the actual summon, the summon event is kind of like a bonus reward event that gives plenty of free coupon. We do ours right before GNW on Wed/Sat to effectively reward GNW participation. I have no sympathy for free loaders.

That said, you could try scheduling it on Monday before 5am (i.e. between the midnight "refresh" and the 5am "refresh"). I'm not sure if it would work but it's something to try.