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World Clock

See the current local time in major world cities at a glance, live-updating every second and fully daylight-saving aware.

Privacy: your files never leave your device. All processing happens locally in your browser.

How to use

  1. 1.Open the tool. It immediately starts a live board showing the current time in a default set of major world cities, updating every second.
  2. 2.To track another city, pick it from the Add a city dropdown and press Add. Its local time, date, weekday, and UTC offset appear instantly.
  3. 3.To stop tracking a city, click Remove on its row. Times stay accurate through daylight-saving changes automatically, and nothing is sent anywhere.

About World Clock

The World Clock shows you the current local time in major cities around the globe, all on a single screen and updating live every second. Instead of doing time-zone math in your head or opening a search tab for every colleague, client, or family member, you get a clean, always-accurate board that answers one question instantly: what time is it right now over there? Each city row displays the local time in a clear 24-hour format, the weekday and date, and the exact UTC offset for that moment, such as UTC+9 for Tokyo or UTC-4 for New York in summer. A small sun or moon icon hints at whether it is daytime or night, so you can tell at a glance whether it is a reasonable hour to call. The clock starts with a sensible default set of well-known zones spanning the Americas, Europe, the Middle East, South Asia, East Asia, and Oceania. From the dropdown you can add any of two dozen major cities, including Los Angeles, Denver, Chicago, New York, Sao Paulo, London, Paris, Berlin, Moscow, Dubai, Mumbai, Kathmandu, Bangkok, Singapore, Shanghai, Hong Kong, Tokyo, Seoul, Sydney, Auckland, and Honolulu, plus plain UTC. Remove any city you no longer need with a single click, and the board rearranges itself immediately. What makes this world clock reliable is that it is genuinely daylight-saving aware. Time zones are not fixed offsets: New York sits at UTC-5 in winter but shifts to UTC-4 during Eastern Daylight Time in summer, and London moves between UTC+0 and UTC+1 for British Summer Time. This tool reads the offset for the exact instant being displayed, so the numbers stay correct across DST transitions without any manual adjustment. It also handles the awkward zones that trip up naive converters, including half-hour offsets like India at UTC+5:30 and forty-five-minute offsets like Nepal at UTC+5:45. All of this runs entirely inside your web browser using the built-in international time-zone database that ships with modern browsers. There is no server call, no account, and no tracking: your device already knows every time zone rule, so the tool simply asks it and renders the result. Because nothing is uploaded, your location and the cities you choose never leave your computer, and the clock keeps working even on a flaky connection once the page has loaded. It is built with plain JavaScript and the standard international date and time formatting APIs that every current browser provides, which keeps the page tiny, instant to load, and light on your battery. There is no heavy framework doing the timekeeping and no external dependency to break. The tool is also careful about the details that catch simpler clocks off guard. Times are shown in an unambiguous 24-hour format so there is never a question of whether 8 means morning or evening. Dates are rendered per city, which matters because two places can be on different calendar days at the very same instant: when it is late evening on the American east coast, Tokyo and Sydney have already moved into the following morning. Seeing the weekday and date next to each clock makes those day boundaries obvious, so you never accidentally schedule a meeting for what turns out to be the wrong day on the other side. Common use cases are everywhere in modern remote work and personal life. Schedule a global standup without waking a teammate at 3 a.m. Find a fair overlap window for a call between offices in London, Mumbai, and San Francisco. Coordinate a product launch or a maintenance window across regions. Keep an eye on a stock market open, a sports fixture, or a live stream happening abroad. Or simply know whether it is a decent hour to message a friend or relative overseas before you hit send. Whatever the reason, the World Clock gives you a fast, private, and dependable answer that stays correct all year round, including the twice-yearly daylight-saving shifts that quietly move offsets by an hour. Open it, add the cities that matter to you, remove the ones you do not, and watch them tick in real time.

Frequently asked questions

Does it handle daylight saving time?
Yes. Each city uses your browser's built-in time-zone database, which knows daylight-saving rules. The offset shown reflects the exact moment displayed, so New York correctly reads UTC-5 in winter and UTC-4 in summer, and London switches between UTC+0 and UTC+1. Half-hour and 45-minute zones like India (UTC+5:30) and Nepal (UTC+5:45) are handled too.
Is my location sent anywhere?
No. The entire clock runs in your browser using the standard Intl time-zone data that already ships with it. There is no server call, no account, and no tracking. The cities you add and your own location never leave your device, and the tool keeps working offline once the page has loaded.
Why is a city one day ahead or behind me?
Time zones far to the east or west can be on a different calendar day at the same instant. For example, when it is early evening in New York it is already the next morning in Tokyo. Each row shows the weekday and date for that city so you can see when it crosses midnight relative to you.

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