Okay so Samhain is 19:15 UTC on Monday 6th November evening or later for all folks east, 2.15pm NYC, and earlier still for all points west.
Don’t know if that changes things for anyone, I have some ideas - start the ball rolling at 19:15 (7.15pm) for the first member east of the dateline to want to be involved, choosing a constellation or star we can all locate (chances of seeing it are slimmer in northern Europe due to clouds), then follow it round so we each get an evening shot at our 19:15, using the same link depending on who’s south of the Equator?