Well, we need to look at the demographic of trips. All I've got to work on was Korea but I put that at a broad guess of 60% USA, 40% European. On that basis I'd suggest 2:00pm PST, which is I think 9:00pm in the UK, 10:00pm in France/Scandi, and 7:00am in Australia so those should be able to join too if they want to.
I've yet to whine; if you read my posts you'll see that.
If you consider going to bed before 1:00am on a work night to be beauty sleep, well, I guess there's nothing more I can say to that.
I don't think there's much to be gained by continuing this debate so this will be my last post on the topic. I'll just conclude by repeating what I've already said - I'll be there in spirit!