^^ with regard to times again, 7 pm would probably be ideal for the UK peeps, perhaps a little late for the Euros further to the right on the map, & as pointed out a little early for the Aussies etc...
If the race is done on a Sunday I would have thought this would be a problem for pretty much every one. Most will want a reasonably early night Sunday night ready for work Monday morning, so late enough for the UK peeps, too late for the Euros, the Aussies would be racing 6 am monday morning, so kind of excludes them, & peeps in similar time zones... (all times local)
I know peeps like to go out at weekends, for me Pub night is Friday night, I dont mind not going out Saturday night but would like to get a few pints in if possible, the point being Saturday night racing is I think ideal. With other time zones involved doing it on Friday night some peeps will still be at work (in the Americas), doing it on Sunday night some peeps will be getting ready for work (Aus - Asia) & Euros eg Ukraine looking at a 1 am finish time on Monday morning, not good if you have to get up at 5 am.
IMO Sunday is a bad idea as it will exlcude too many people