What Is a Digital Clock and How Does It Work?
A digital clock displays time as numbers (hours, minutes, seconds) instead of hands on a
dial. This page converts your device's system clock to your chosen city's time zone using
JavaScript's Intl API and updates it every second — entirely in your browser,
without sending any data to a server.
About Time Zones
The world is divided into dozens of time zones relative to Coordinated Universal Time (UTC). Use the selector above to check the current time in Istanbul, London, New York, Tokyo, and more, or compare several cities at once on the World Clock page.
Frequently Asked Questions
What is a digital clock?
A digital clock shows time as numbers (hours:minutes:seconds) rather than with hour and minute hands. It's quick to read and widely used on screens.
What is a time zone and how is it calculated?
Time zones are fixed or daylight-saving-adjusted offsets from UTC. Istanbul, for example, is in the UTC+3 zone. This site calculates your chosen city's current time using your browser's time zone data.
What's the difference between 12-hour and 24-hour format?
In 24-hour format, the day runs from 00:00 to 23:59 as a single sequence. In 12-hour format, the day is split in two, with AM or PM indicating before or after noon.
How accurate is the time shown on this site?
The time comes from your device's system clock. If your device syncs its clock automatically over the internet, the time shown is accurate to the second.