Each card shows the city's local time, today's date there, and its UTC offset right now. The offset is the useful part: it is the number you add to UTC to get local time, and it changes when a place switches to or from daylight saving time. London shows UTC+00:00 in winter and UTC+01:00 in summer; Tokyo shows UTC+09:00 all year.

Two cities can show different dates at the same moment. When it is Sunday evening in New York it is already Monday morning in Sydney, so check the date line on each card before you plan a call. The UTC clock at the top is the common reference: if you are agreeing a time with someone in another country, quoting it in UTC removes any doubt.

The clock uses your device's own clock and your browser's copy of the IANA time zone database, so it does not need to be told when daylight saving starts or ends. It only knows what your device knows: a wrong device clock means wrong times here too.

Major Time Zones at a Glance

Time zone	UTC offset	Major cities	Daylight saving
PST / PDT	UTC−8 / UTC−7	Los Angeles, San Francisco, Seattle (Vancouver is on UTC-7 all year since March 2026)	Yes, 2nd Sun Mar to 1st Sun Nov
MST / MDT	UTC−7 / UTC−6	Denver, Salt Lake City (Phoenix stays on MST all year)	Yes, 2nd Sun Mar to 1st Sun Nov
CST / CDT	UTC−6 / UTC−5	Chicago, Dallas, Houston	Yes, 2nd Sun Mar to 1st Sun Nov
CST (Mexico)	UTC−6	Mexico City	No (ended in 2022)
EST / EDT	UTC−5 / UTC−4	New York, Miami, Toronto, Atlanta	Yes, 2nd Sun Mar to 1st Sun Nov
GMT / BST	UTC+0 / UTC+1	London, Dublin, Lisbon (Lisbon calls it WET / WEST)	Yes, last Sun Mar to last Sun Oct
GMT (Iceland)	UTC+0	Reykjavik	No
CET / CEST	UTC+1 / UTC+2	Paris, Berlin, Amsterdam, Rome, Madrid	Yes, last Sun Mar to last Sun Oct
IST	UTC+5:30	Mumbai, Delhi, Bangalore, Kolkata, Chennai	No
CST (China)	UTC+8	Beijing, Shanghai, Shenzhen, Chengdu	No
JST	UTC+9	Tokyo, Osaka, Kyoto, Hiroshima	No
AEST / AEDT	UTC+10 / UTC+11	Sydney, Melbourne, Canberra (Brisbane stays on AEST all year)	Yes, 1st Sun Oct to 1st Sun Apr

Dates are the usual rules for each region; individual countries and states can differ. Southern Hemisphere regions such as New South Wales use summer time during the northern winter.

How Much Working-Hours Overlap Do Two Cities Have?

Overlap between a 9 AM to 5 PM day in both cities, calculated from each city's actual UTC offset on January 15 and July 15, 2026. Times are in the first city's local time.

City pair	Mid-January	Mid-July
New York and London	3 h (9 AM to 12 PM New York)gap 5h	3 h (9 AM to 12 PM New York)gap 5h
Los Angeles and London	Nonegap 8h	Nonegap 8h
London and Mumbai	2.5 h (9 AM to 11:30 AM London)gap 5h 30m	3.5 h (9 AM to 12:30 PM London)gap 4h 30m
New York and Mumbai	Nonegap 10h 30m	Nonegap 9h 30m
New York and Sydney	Nonegap 16h	Nonegap 14h
Singapore and Sydney	5 h (9 AM to 2 PM Singapore)gap 3h	6 h (9 AM to 3 PM Singapore)gap 2h

The gap and the overlap are not constant across the year. In the weeks when the US has moved its clocks and Europe has not (from the second Sunday of March to the last Sunday of March, and again for about a week between the European change in late October and the US change in early November), the New York to London gap is 4h instead of 5h, and a 9 to 5 day overlaps by 4 hours instead of 3. Recurring calls that look fine in February can move by an hour for a few weeks.

Pairs with no overlap, such as New York and Mumbai, work by stretching one side of the day: an 8 to 9:30 AM call in New York is evening in India. For a full check across more than two cities, use the meeting scheduler, or look up a specific pair on the time difference pages.

World Clock or Time Zone Converter?

Use a world clock when you want to know what time it is in several places right now, for example to see who is online before you message them. Use the time zone converter when you have a specific time and need to know what it becomes elsewhere, such as an interview at 3 PM Eastern. The comparison post goes through the cases where each one fits.

Frequently Asked Questions

What is a world clock?

A world clock shows the current local time in several cities at once. A time zone converter answers "what will 3 PM here be there?", while a world clock answers "what time is it there right now?".

How do I add a city to the world clock?

Type a city, country or time zone name (for example Kolkata, Japan or Europe/Paris) into the search box and click the city. It is added to your clock. You can keep up to 30 cities. Your selection is not saved, so it resets when you reload the page.

How accurate is the time shown?

The page reads the current moment from your device clock and works out each city's local time with the time zone rules built into your browser (the IANA time zone database). If your device clock is wrong, every time on the page is off by the same amount. If a government changes its daylight saving rules, browsers pick up the new rules when they are updated.

Which places do not observe daylight saving time?

Many do not, including Japan, China, India, Singapore, the Philippines, Indonesia, most Gulf states, Russia, Turkey and Mexico (which ended it in 2022). In the United States, Arizona (except the Navajo Nation) and Hawaii stay on standard time all year. Iceland stays on GMT all year.

Will the EU stop changing the clocks?

Not yet. The European Parliament voted in 2019 to end seasonal clock changes, but EU governments have not agreed a common position, so clocks in EU countries still change twice a year.

What is the current time in London, New York and Tokyo?

See the live cards above. London is on GMT (UTC+0) in winter and BST (UTC+1) in summer. New York is on EST (UTC-5) in winter and EDT (UTC-4) in summer. Tokyo is on JST (UTC+9) all year.

World Clock

Popular City Clocks

New York

Los Angeles

London

Paris

Tokyo

Dubai

Sydney

Mumbai

Beijing

How to Read the Clocks