World Time Converter
See the current time in cities around the world and convert any time between time zones instantly. Clocks update every second.
Live World Clocks
United Kingdom · UTC+01:00
18:06:02
Thu 7 May
United States · UTC-04:00
13:06:02
Thu 7 May
UAE · UTC+04:00
21:06:02
Thu 7 May
Japan · UTC+09:00
02:06:02
Fri 8 May
Australia · UTC+10:00
03:06:02
Fri 8 May
Time Zone Converter
Enter a time in one zone and instantly see what it is in another.
London
09:00
New York
04:00
Current UTC Offsets — Major Cities
| City | Country | Current Time | UTC Offset |
|---|---|---|---|
| London | United Kingdom | 18:06:02 | UTC+01:00 |
| New York | United States | 13:06:02 | UTC-04:00 |
| Los Angeles | United States | 10:06:02 | UTC-07:00 |
| Chicago | United States | 12:06:02 | UTC-05:00 |
| Toronto | Canada | 13:06:02 | UTC-04:00 |
| Sao Paulo | Brazil | 14:06:02 | UTC-03:00 |
| Paris | France | 19:06:02 | UTC+02:00 |
| Berlin | Germany | 19:06:02 | UTC+02:00 |
| Madrid | Spain | 19:06:02 | UTC+02:00 |
| Rome | Italy | 19:06:02 | UTC+02:00 |
| Amsterdam | Netherlands | 19:06:02 | UTC+02:00 |
| Stockholm | Sweden | 19:06:02 | UTC+02:00 |
| Moscow | Russia | 20:06:02 | UTC+03:00 |
| Dubai | UAE | 21:06:02 | UTC+04:00 |
| Mumbai | India | 22:36:02 | UTC+05:30 |
| Delhi | India | 22:36:02 | UTC+05:30 |
| Bangkok | Thailand | 00:06:02 | UTC+07:00 |
| Singapore | Singapore | 01:06:02 | UTC+08:00 |
| Hong Kong | China | 01:06:02 | UTC+08:00 |
| Shanghai | China | 01:06:02 | UTC+08:00 |
Quick Facts
There are 24 standard time zones, but some countries use 30- or 45-minute offsets.
The UK uses GMT in winter and BST (UTC+1) in summer — clocks change in March and October.
The International Date Line runs through the Pacific Ocean at roughly 180 degrees longitude.
India uses a single time zone (IST, UTC+5:30) despite spanning over 2,900 km east to west.
China uses a single time zone (CST, UTC+8) despite its vast geographic width.
How World Time Zones Work
The world is divided into 24 primary time zones, each roughly 15 degrees of longitude wide, corresponding to one hour of the Earth's 24-hour rotation. Coordinated Universal Time (UTC) serves as the global reference point — all other time zones are expressed as offsets from UTC, either positive (east of the prime meridian) or negative (west of it).
In practice, political and geographic boundaries mean that many countries do not follow the strict 15-degree divisions. Some nations use half-hour or quarter-hour offsets: India (UTC+5:30), Iran (UTC+3:30), Nepal (UTC+5:45), and Australia's central states (UTC+9:30 and UTC+10:30) are notable examples. China and India each use a single national time zone despite their enormous geographic spans.
Daylight Saving Time (DST) Explained
Daylight Saving Time (DST) is the practice of advancing clocks by one hour during the warmer months so that evenings have more daylight. The United Kingdom observes British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October. During winter, the UK reverts to Greenwich Mean Time (GMT, UTC+0).
Not all countries observe DST. Most of Africa, Asia, and parts of South America do not change their clocks. The United States and Canada observe DST from the second Sunday in March to the first Sunday in November — different dates from the European schedule. This means that for a few weeks each year, the time difference between the UK and the US East Coast is only 4 hours rather than the usual 5.
This converter uses your browser's built-in Intl API, which automatically accounts for DST transitions based on the current date. The DST badge on a city clock indicates that location is currently observing summer time.
Tips for Scheduling Across Time Zones
When scheduling meetings or calls across multiple time zones, always state the time with the UTC offset to avoid ambiguity — for example, "3pm GMT" or "10am EST (UTC-5)". Relying on city names alone can cause confusion during DST transitions when offsets temporarily change.
For teams spanning the UK, US East Coast, and India, the overlap window for normal working hours is narrow: approximately 1:30pm–5:30pm UK time (8:30am–12:30pm New York, 7pm–11pm India). The UK-to-Australia overlap is even more challenging, with a 9–11 hour difference depending on DST in both countries.
Frequently Asked Questions
What is UTC and how does it differ from GMT?
UTC (Coordinated Universal Time) is the primary time standard used worldwide. GMT (Greenwich Mean Time) is a time zone used by the UK in winter. For most practical purposes they are identical, but UTC is the scientific standard maintained by atomic clocks, while GMT is based on the Earth's rotation. The UK uses GMT in winter (UTC+0) and BST in summer (UTC+1).
Why does the time difference between two cities change throughout the year?
This happens because different countries start and end Daylight Saving Time on different dates. For example, the US switches clocks two to three weeks before Europe in spring, creating a period where the US-UK time difference is temporarily one hour less than usual.
How accurate are the times shown on this converter?
The times are generated by your browser using the IANA time zone database, which is the same standard used by operating systems, Google Calendar, and most scheduling software. They are accurate to the second and automatically account for DST transitions.
Which countries do not observe Daylight Saving Time?
Most countries near the equator do not observe DST as the seasonal variation in daylight hours is minimal. These include most of Africa, South and Southeast Asia, China, Japan, South Korea, India, and most of the Middle East. Russia abolished DST in 2014 and now stays on permanent standard time.