Aww, thank you!
Going from what Olive said, I think closer to the 5th would be good. The 18th is when a lot of schools kick out for the Christmas holiday, which may mean that a fair few members would be spending time with family at that point and wouldn't have the time. The further we can get away from Christmas itself would probably be better.
Honestly it would be best to properly research which host to use if you wanted to go ahead with it. Some sites like to put up fees for international calls, others drop unexpectedly, require personal details to be shared, e.c.t. e.c.t.
Time zones aren't all that difficult to work around. The most difficult one would be Australia and New Zealand, since they're nearly an entire day ahead of US time zones and 11 hours ahead of UK time zones, which unfortunately could exclude dear werewolf Colin and itiwhetu to name a couple. Maybe proposing two meetings for different "blocks" of time zones would fix that? Though it does complicate things a fair bit.
That'd definitely be good lol. Scrolling through some older posts reveals some really unsavoury rubbish about women in the fishkeeping community and other bits and bobs of bigotry that probably wouldn't be taken well in a face-to-face (well, sort of face-to-face) setting.