World Clock

World Clock shows the current time across multiple timezones simultaneously, refreshing every second. Each card displays the city name, UTC offset (e.g. UTC+8), a day/night icon, the time in HH:MM:SS 24-hour format, and the weekday/date. Your selected timezones persist in IndexedDB so they survive page reloads.

1. The clock starts with a default set of 10 zones (UTC, New York, Los Angeles, London, Berlin, Shanghai, Tokyo, Kolkata, Sydney, etc.). 2. Type a city or timezone ID in the search box to filter the dropdown, then click an entry to add it. 3. Hover over any card and click the X button in the top-right to remove that timezone. 4. Cards update every second automatically.

Around 50 zones are available, spanning UTC, Pacific (Honolulu, Auckland), the Americas (Anchorage to Buenos Aires), Europe (London to Istanbul/Moscow), Africa (Cairo, Lagos, Nairobi), Asia (Dubai to Tokyo), and Australia (Perth, Sydney, Melbourne). Offsets are computed live via Intl.DateTimeFormat shortOffset names, so DST transitions are reflected automatically. Locale-aware formatting applies for zh-cn, zh-tw, ja, and en.