World Clock

Live time across major cities. Fully client-side, no data sent anywhere.

Format:

📍 Your Local Time - UTC

10:48:17 AM

Date

Tue, Mar 17, 2026

UTC+0

🇺🇸

New York

USA

06:48:17 AM

Tue, Mar 17, 2026

UTC-4

🇬🇧

London

10:48:17 AM

Tue, Mar 17, 2026

UTC+0

🇫🇷

Paris

France

11:48:17 AM

Tue, Mar 17, 2026

UTC+1

🇦🇪

Dubai

UAE

02:48:17 PM

Tue, Mar 17, 2026

UTC+4

🇮🇳

Mumbai

India

04:18:17 PM

Tue, Mar 17, 2026

UTC+5:30

🇸🇬

Singapore

06:48:17 PM

Tue, Mar 17, 2026

UTC+8

🇯🇵

Tokyo

Japan

07:48:17 PM

Tue, Mar 17, 2026

UTC+9

🇦🇺

Sydney

Australia

09:48:17 PM

Tue, Mar 17, 2026

UTC+11

Meeting Planner

Pick a time in one timezone and see what time it is everywhere else.

Source timezone

Hour

Minute

Your Local Time (UTC)SOURCE

09:00 AM

🇺🇸 New York

05:00 AM

🇬🇧 London

09:00 AM

🇫🇷 Paris

10:00 AM

🇦🇪 Dubai

01:00 PM

🇮🇳 Mumbai

02:30 PM

🇸🇬 Singapore

05:00 PM

🇯🇵 Tokyo

06:00 PM

🇦🇺 Sydney

08:00 PM

Privacy note

All time calculations run entirely in your browser using the Intl API.
No data is sent to any server or stored anywhere.

Understanding Time Zones

Time zones divide the Earth into regions that observe the same standard time. The system was established in the late 19th century to standardize time for railways and telecommunications. Today the world uses 24 primary time zones, each roughly 15 degrees of longitude wide, though many zones have irregular boundaries shaped by political and economic considerations.

Each time zone is defined as an offset from Coordinated Universal Time (UTC). For example, New York is UTC-5 during standard time and UTC-4 during daylight saving time. India uses a single time zone (UTC+5:30) for the entire country despite spanning a wide geographic area. Understanding these offsets is essential when coordinating across regions.

Scheduling Meetings Across Time Zones

Coordinating meetings across time zones is one of the most common challenges for remote teams and international businesses. The key is to find overlap windows where all participants are available during reasonable working hours. A meeting at 9:00 AM in New York is 2:00 PM in London, 6:30 PM in Mumbai, and 11:00 PM in Tokyo.

When scheduling, consider the concept of the golden overlap, which is the window where all time zones fall within standard business hours (roughly 8 AM to 6 PM). For teams spanning more than 10 hours of time zone difference, this overlap may not exist, and you will need to rotate meeting times so that no single group is always inconvenienced.

UTC and GMT Explained

UTC (Coordinated Universal Time) is the primary time standard used to regulate clocks worldwide. It is often confused with GMT (Greenwich Mean Time), but they are technically different. GMT is a time zone used in the UK during winter months, while UTC is a precise time standard maintained by atomic clocks.

In practice, UTC and GMT show the same time. The difference is that UTC is a standard and never changes, while GMT is a time zone that the UK used historically and still uses as its winter time. When you see timestamps labeled UTC or GMT in software and APIs, they refer to the same moment in time with zero offset from the prime meridian.

Daylight Saving Time

Daylight saving time (DST) is the practice of advancing clocks by one hour during warmer months so that evenings have more daylight. Not all countries observe DST. Most of North America and Europe shift clocks forward in spring and back in autumn, while countries near the equator and much of Asia, Africa, and South America do not.

DST creates complications for scheduling because the offset between two cities can change throughout the year. For example, New York and London are 5 hours apart in winter but only 4 hours apart during summer because the US and UK switch to DST on different dates. This world clock automatically accounts for DST using the Intl.DateTimeFormat API, so the times shown are always current and accurate.

Frequently Asked Questions

How accurate is this world clock?

This world clock uses your browser's built-in Intl.DateTimeFormat API, which relies on your operating system's timezone database. The times shown are as accurate as your device's system clock. The display updates every second to show live ticking time for all cities.

Does this tool account for daylight saving time?

Yes. The Intl.DateTimeFormat API automatically handles daylight saving time transitions based on the IANA timezone database built into your browser. When DST starts or ends in any city, the displayed time and UTC offset will update accordingly.

Can I add custom cities or timezones?

Yes. Click the Add City button to search through all available IANA timezones. You can search by city name or region (e.g. Chicago, Asia/Seoul) and add any timezone to your dashboard. You can also remove cities you do not need by clicking the X button on each card.

What is the difference between 12-hour and 24-hour time format?

The 12-hour format uses AM and PM to distinguish morning from afternoon (e.g. 2:30 PM), while the 24-hour format counts hours from 0 to 23 (e.g. 14:30). The 24-hour format is commonly used in military, aviation, healthcare, and most countries outside the United States. You can toggle between the two formats using the 12h/24h buttons.

Does this tool send any data to a server?

No. All time calculations are performed entirely in your browser using JavaScript's built-in Intl API. No data is transmitted to any server, no API calls are made, and nothing is stored. The tool works fully offline after the page loads.

World Clock

Meeting Planner

Understanding Time Zones

Scheduling Meetings Across Time Zones

UTC and GMT Explained

Daylight Saving Time

Frequently Asked Questions

How accurate is this world clock?

Does this tool account for daylight saving time?

Can I add custom cities or timezones?

What is the difference between 12-hour and 24-hour time format?

Does this tool send any data to a server?

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