World Clock

Yes, all times update automatically in real time based on your device's system clock for accurate display.

Yes, using the browser's Intl API, daylight saving time adjustments are automatically reflected for each city.

Line the participating cities up side by side and look for the band where everyone is inside working hours — that is the quickest method. Seoul is eight hours from London and fourteen from New York, so the three overlap for only an hour or two a day. If the same side always has to wake at dawn, alternate the slot week by week to keep it fair. And always spell out the local time for each region in the invitation.

Time zones are not drawn by longitude alone; each country sets its own for political and practical reasons. India runs on UTC+5:30 and Nepal on UTC+5:45 — different even from its neighbour — while Newfoundland uses UTC-3:30. That is why assuming you can simply add whole hours when scheduling leads to mistakes. Always confirm by city name and let a calendar tool do the conversion for you.