first thoughts after short discussion with Lightningkid: Thursday, 20 or 21 GMT (6-7 PM for New York, 7-8 PM for Brazil) could be good time to arrange it. It would be 22-23 in Poland so it could work for most of us, and if it's too late we can always split it as Scorp suggested and make second part on Friday.
It would be cool if all participants could say if they can do it that time- if there are any objections, we can always change it (it's not final date in any way o7)
so, any suggestions?