Daylight saving, handled
Clocks change on different dates in different countries, and some places never change at all. Every time here is worked out by your browser's own time zone database for the exact date you pick, so a meeting next spring shows the offset that will apply then, not today's.
Finding a meeting time
The planner lines up the same 24 hours for every city. Working hours, 9 to 5 on weekdays, are shaded, and the bottom row turns green where they overlap for everyone. Tap any hour to move the time there and see it in every zone at once.
Sharing a time
Copy link makes a web address that holds only the time and the zones you picked, so whoever opens it sees the same comparison in their own browser. Your list of zones is also remembered on this device for next time.