About the World Clock
Every country sets its clocks against Coordinated Universal Time, known as UTC. This page reads your own time zone and shows the live time in each country next to how many hours it is ahead of or behind you.
How time zones work
The world is split into time zones so that noon falls around the middle of the day everywhere. Each zone is written as an offset from UTC, such as UTC+5 for Pakistan or UTC+4 for the United Arab Emirates. A few countries use half hour offsets, such as India at UTC+5:30 and Iran at UTC+3:30.
Daylight saving time
Some countries move their clocks forward one hour in spring and back in autumn. The United Kingdom, much of Europe, most of the United States and Canada, and parts of Australia do this. That is why the gap between Pakistan and London is five hours for part of the year and four hours for the rest. The clocks on this page follow these changes on their own.
Countries with more than one time zone
Large countries span several zones. The United States runs from Eastern time in New York to Pacific time in Los Angeles, a gap of three hours, and Russia, Canada, Australia and Brazil also have several zones. For these countries we show a main city so you know which zone you are looking at.
Plan a call across countries
Before you call someone abroad, check their time on this page and aim for their morning or early evening. For a meeting across many countries, look for the hours where everyone is between 9 in the morning and 6 in the evening.
Quick ideas
- Call family or friends abroad at a good hour
- Plan meetings with teams in other countries
- Check opening hours before you contact a business
- Know when a live match or event starts where you are
How to use it
Press Start. The orange ring shrinks as time passes and the time left also shows in your browser tab, so you can see it while you work in another tab. Press Pause to stop and Resume to carry on. When it reaches zero, the alarm plays and the numbers flash.
Related tools
Frequently asked questions
How does the world clock know my time?
It reads the time zone set on your phone or computer, then works out the time in each country from it.
Does it include daylight saving time?
Yes. Countries such as the United Kingdom, the United States and Australia change their clocks for part of the year, and the times here follow those changes.
Why do some countries show more than one city?
Large countries such as the United States cover several time zones, so we show a main city for each zone.