Last few wars we just picked a time first and saw if people could show up lol.
We played against BOOM at 5PM GMT +1 last war, this seemed like a decent time that could suite American players up to Russian players time zone wise (as it wasn't too early or late for either).
As for the day I'd love for us to get at least some matches done before the 4the as one of my main players is going on holiday that day.