Hmmm...Don you live in Switzerland? Oo Wow.
Well as long as someone indicates what time zone it is in ( GMT=?) it should be a bit easier.
Or make the announcement and either you or another person convert it into different time zones. ( Like the main ones. Popular places) Of course if people see a bunch of GMT +2 or GMT -5 it might just confuse them.
Ahh time zones, one of the most easy ways to confuse people. Well, since it's a meeting and it requires people to figure out time zones at least it would narrow down the the people who doesn't care a rat's.....about what's going on.
This is a older thread...I wonder if anyone resolved this issue....