Hello, I'm at pypy right now but I'd like to chime in on this topic. I've hosted a lot of NA events and it's been my experience that the best time to host events if you want them to be successful is around 10 - 11 EST. Any earlier and you'll have trouble filling up the world. Any later and people will start leaving before it's done. 
I see a lot of people throwing insults around in here but isn't that stuff really irrelevant? You want to start events at times that make the event more likely to be successful and in my experience it's the 10 - 11 EST range that NA people want to show up for. 

NA people want to hang around and play flat games or chat on discord or whatever they do in the evenings. People seem to want to log on late and stay up late.