World Clock — Live Time in Major Cities
Live current time in 12 major cities around the world, updating every second.
How to use this tool
- Open this page — it runs instantly in your browser, no signup or install.
- Allow any permission prompt if asked; everything stays on your device.
- Use the on-screen controls — results update live.
Live current time in 12 major cities around the world, updating every second.
How it works
The World Clock displays the live current time in 12 major cities around the world, updating every second. No input is needed -- simply open the widget and see the current local time for locations spanning every major continent and timezone.
Each city is paired with its IANA timezone, so the times shown automatically reflect Daylight Saving Time where applicable. During DST periods, a city's clock shifts accordingly without any manual adjustment required.
Use this widget as a quick desktop reference when you need to know what time it is for a colleague in Tokyo, a client in London, or a partner in New York without leaving your current page. It is especially handy for remote teams that span multiple continents.
The live display updates every second using your browser's clock synchronized to your system time. If your computer's clock is accurate (most systems sync via NTP automatically), the times shown will be accurate to within a second for any planning purpose.
Worked example
Check business hours across offices before sending a message
- Open the World Clock widget.
- Scan the displayed times for your relevant cities (e.g. New York, London, Singapore).
- Identify which offices are currently within 9 AM to 5 PM working hours.
- Send your message to the offices currently open, and schedule the others for later.
Instant visibility into which offices are open right now, with no manual calculation needed.
Common mistakes to avoid
- Assuming all countries in a region share one time -- for instance, China spans five geographic zones but uses a single official time (UTC+8).
- Using the world clock to plan meetings without accounting for DST changes that differ by country -- two cities whose offset was one hour apart may become two hours apart after a transition.
- Relying on the clock when your system time is incorrect -- if your computer's clock is wrong, all displayed times will be off by the same amount.
Key terms
- NTP (Network Time Protocol)
- A protocol that synchronizes computer clocks over the internet to within milliseconds of reference time servers, ensuring system clocks are accurate.
- Live clock
- A digital display that updates continuously in real time, as opposed to showing a static snapshot of the time at page load.
- Business hours
- The typical working day window (commonly 9 AM to 5 PM local time) used to determine appropriate times for reaching contacts.
Frequently asked questions
- How often does the world clock update?
- Every second, using your browser's real-time clock and the Intl.DateTimeFormat API for accurate timezone conversion.