A world clock for every city you work, travel or call
The World Clock shows the current local time in several cities side by side, updating every second. It opens with New York, London, Dubai, Mumbai, Singapore, Tokyo and Sydney — the places people check most — and you can add any other city or official time zone in a few keystrokes.
Each clock shows the date, the UTC offset, how far ahead or behind you it is, the local time-zone abbreviation and whether it is day or night there. Your list and settings stay on this device, so the page opens the way you left it.
How to use the World Clock
- Check Your time at the top — it uses your device’s time zone.
- Type in Add a city or time zone: a city (“Paris”), a country (“Brazil”), an abbreviation (“PST”, “IST”) or an offset (“UTC+8”). Pick a result with a click or the arrow keys and Enter.
- Read each card: local time, date (with Today, Tomorrow or Yesterday), UTC offset and the difference from your time. The sun or moon shows day or night.
- Use the arrow buttons to reorder cities and × to remove one. Reset to default cities restores the starting list.
- Switch between 12- and 24-hour time, and hide seconds if you prefer a calmer display.
World Clock features
Live, second-by-second
All clocks tick together, aligned to the start of each second.
Every official time zone
Search hundreds of IANA time zones built into your browser, plus friendly names for major cities such as Mumbai, San Francisco and Dubai.
Daylight saving handled
Offsets and abbreviations such as EST/EDT or GMT/BST switch automatically on the right dates.
Ahead or behind at a glance
Each card says exactly how many hours and minutes it differs from you, including half-hour zones like India and Nepal.
Day and night indicator
A sun or moon icon and a darker card show whether it is a sensible hour to call.
Saved on your device
Your cities, their order and your clock format are remembered without an account.
Understanding UTC offsets and time zones
UTC (Coordinated Universal Time) is the reference clock for the world. Every time zone is described by its offset from UTC: New York is UTC−5 in winter, London is UTC+0, Mumbai is UTC+5:30 and Tokyo is UTC+9. Not every zone is a whole number of hours — India and Sri Lanka are 5½ hours ahead, Nepal 5¾, Iran 3½ and parts of Australia 9½.
The clocks use the IANA time-zone database built into your browser, the same data used by phones and operating systems. It records each region’s rules and their history, so offsets are correct even where a country has recently changed its rules.
| City | Standard time | Daylight saving time |
|---|---|---|
| New York | EST, UTC−5 | EDT, UTC−4 (Mar–Nov) |
| London | GMT, UTC+0 | BST, UTC+1 (Mar–Oct) |
| Paris / Berlin | CET, UTC+1 | CEST, UTC+2 (Mar–Oct) |
| Dubai | GST, UTC+4 | Not used |
| Mumbai / New Delhi | IST, UTC+5:30 | Not used |
| Tokyo | JST, UTC+9 | Not used |
| Sydney | AEST, UTC+10 | AEDT, UTC+11 (Oct–Apr) |
Why the difference between two cities changes
Daylight saving time starts and ends on different dates around the world. The United States moves its clocks on the second Sunday of March and the first Sunday of November; the UK and EU on the last Sundays of March and October. For a few weeks each spring and autumn, New York is only 4 hours behind London instead of the usual 5. In the southern hemisphere the seasons are reversed, so Sydney moves its clocks forward in October.
Because the world clock asks the time-zone database for each moment, it always shows the current difference. To compare a future date and time, or to find a meeting slot, use the Time Zone Converter.
Tips for working across time zones
- Keep the cities of your colleagues, clients or family on the list, in the order you check them.
- Look for the sun icon before calling — a moon means it is between 6 pm and 6 am there.
- Schedule in the other person’s time zone or in UTC to avoid mistakes, and mention the zone in invitations.
- Set a reminder with the Alarm Clock for calls at unusual hours.
World Clock FAQ
What time is it in other countries right now?
The world clock shows the current time in each city on your list, updated every second. Search for any city or country to add it.
Does the world clock adjust for daylight saving time?
Yes. It uses your browser’s built-in time-zone database, so clocks switch between standard and daylight time on the correct dates for each region.
How is the time difference calculated?
Each city’s current UTC offset is compared with yours. For example, if you are in London (UTC+1 in summer) and look at Mumbai (UTC+5:30), Mumbai is 4 h 30 min ahead.
Can I search by time-zone abbreviation?
Yes. Abbreviations such as IST, EST, PST, GMT, CET, JST and AEST work, as do offsets like UTC+8 or GMT-5. Some abbreviations are shared — IST can mean India, Israel or Ireland — so check the country in the results.
Why does a city show a different date?
Cities far east or west can already be in tomorrow or still in yesterday. The card marks this with Tomorrow or Yesterday next to the date.
Is my city list saved?
Yes, in your browser’s local storage on this device. Nothing is uploaded, and clearing your browser data resets it.