About this clock

It shows the time from your device, in your own time zone, to the second. Choose 12- or 24-hour time, and turn the seconds and the date on or off. Your choices are remembered in this browser.

Full screen (or the F key) fills the screen with the clock, which is handy on a spare monitor, a tablet on a desk, or a TV during an event. Press Esc to leave.

Questions

How accurate is it? As accurate as your device’s clock. Phones and computers set their time over the internet, so it’s usually right to within a fraction of a second.

Can I see other cities? Yes: the World Clock shows several time zones side by side.