Booking a call with an overseas client, catching a friend abroad or watching another market open all start with the same question: what time is it there? This world clock shows several cities side by side in real time, starting with Taipei, Tokyo, London and New York. Each card has an analog clock, the digital time, the date and a sun or moon icon (6:00–18:00 local counts as day), so you can tell at a glance whether someone is in office hours.
The search box covers every IANA time zone your browser supports. Type "Paris", "Sydney" or "Asia/Kolkata" and the list shows each zone with its current UTC offset, for example [UTC+05:30]; click Add to create a card. Any card can be set as the primary city, and the others then show how many hours ahead or behind they are. Zones with half-hour or 45-minute offsets, such as India or Nepal, show fractional differences like 2.5h.
Times are calculated from the browser’s built-in time zone database through the Intl API, so daylight saving time is applied automatically. London is UTC+1 in summer and UTC+0 in winter, New York is UTC−4 in summer and UTC−5 in winter, and the gap between them and cities without DST shifts by an hour with the seasons. There are no rules to memorize.
Toggle between 12-hour and 24-hour format in the top bar; your choice is remembered in the browser. The Copy button turns all cards into a one-line summary such as "Taipei 14:00 | Tokyo 15:00 | London 07:00", ready to paste into a calendar invite or chat. The tool shows the current time only; to plan a future meeting, set your city as primary and apply the offsets shown.