Online clock
The current time in any time zone, big enough to read across the room.
Press Esc to exit
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A clock for the second screen, the classroom projector, the stream overlay or the corner of the desk you glance at while you work. It reads the time from your device, shows it as large as the window allows, and puts today's date and the offset from UTC underneath. Switch between 12 and 24 hours, hide the seconds when they distract, and pick any time zone in the world to follow a colleague's morning or a market's close. One click fills the screen; your choices are kept on this device and in the link.
How to use
- Choose 24-hour or 12-hour time, and a digital or flip face.
- Pick a time zone, or leave it on your device's own zone.
- Turn the seconds or the date off if you want a calmer face.
- Click Go full screen to fill the display; press Esc to come back.
- Use Copy the time to put the time, date and offset on the clipboard.
What it handles
- The offset comes from your browser's time zone database, so daylight saving is applied on the night it happens.
- Half-hour and quarter-hour zones read correctly: UTC+05:30 in Kolkata, UTC+05:45 in Kathmandu, UTC-03:30 in St John's.
- 12-hour mode writes 9:41 AM without a leading zero and calls midnight 12:00 AM; 24-hour mode writes 09:41.
- Every tick is scheduled on the next real second, so a laptop that has been asleep is right again at once.
- The browser tab title carries the time, which is enough to read it from another window.
- The time zone and the other settings travel in the address, so a bookmark reopens the same clock.
FAQ
How accurate is this clock?
It shows your device's clock, so it is exactly as accurate as your computer or phone. Most devices synchronise with a network time server and stay within a fraction of a second. Nothing is fetched from us, so the reading never waits for your connection.
Does the clock follow daylight saving time?
Yes. Time zones come from the database that ships with your browser, so a zone that moves its clocks in spring and autumn changes here on the same night, and a zone that stopped moving them stays put. The line under the clock shows the offset that applies right now.
Does it work offline?
Yes. Once the page has loaded, the clock needs no connection: the time comes from your device and the formatting happens in the page. You can switch off Wi-Fi and keep the tab open for days. Nothing about your settings or your zone is sent anywhere.
Will the screen dim while the clock is on?
In full screen the page asks the browser for a screen wake lock, which keeps most laptops and phones from dimming while the clock is visible. Not every browser offers it, and a device on low battery can refuse it. If your screen still dims, raise the sleep timeout in your system settings.
Can I share a clock set to another city?
Yes. Choose the zone, then copy the address from the browser. It carries the zone, the hour format, the face and whether seconds and the date are shown, so whoever opens the link sees the same clock. The same choices are kept on your device for the next visit.
Why does my zone show a city I do not live in?
Zone names are the names of the database, not of your town: a whole country is often filed under one city, and your browser reports the nearest one it knows. The time and the offset are still right, and you can pick any city in the list that shares your offset.
Updated