Looking for best world time zone meeting coordinator

[tuqqer]

space-time wrote:
Do you really need a web site for this? A simple map with time zones should be all you need.

We've used that up until now. But there's now 4-6 time zones and each iteration of suggestions confuses emails and eventually, one of the persons in one of the time zones gets it wrong, and the video conference happens without them. Expensive.