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

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

Format:

📍 Your Local Time - UTC

07:50:57 AM

Date

Thu, Apr 30, 2026

UTC+0

🇺🇸

New York

USA

03:50:57 AM

Thu, Apr 30, 2026

UTC-4

🇬🇧

London

08:50:57 AM

Thu, Apr 30, 2026

UTC+1

🇫🇷

Paris

France

09:50:57 AM

Thu, Apr 30, 2026

UTC+2

🇦🇪

Dubai

UAE

11:50:57 AM

Thu, Apr 30, 2026

UTC+4

🇮🇳

Mumbai

India

01:20:57 PM

Thu, Apr 30, 2026

UTC+5:30

🇸🇬

Singapore

03:50:57 PM

Thu, Apr 30, 2026

UTC+8

🇯🇵

Tokyo

Japan

04:50:57 PM

Thu, Apr 30, 2026

UTC+9

🇦🇺

Sydney

Australia

05:50:57 PM

Thu, Apr 30, 2026

UTC+10

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

10:00 AM

🇫🇷 Paris

11:00 AM

🇦🇪 Dubai

01:00 PM

🇮🇳 Mumbai

02:30 PM

🇸🇬 Singapore

05:00 PM

🇯🇵 Tokyo

06:00 PM

🇦🇺 Sydney

07:00 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.

World Clock

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

Format:

📍 Your Local Time - UTC

07:50:57 AM

Date

Thu, Apr 30, 2026

UTC+0

🇺🇸

New York

USA

03:50:57 AM

Thu, Apr 30, 2026

UTC-4

🇬🇧

London

08:50:57 AM

Thu, Apr 30, 2026

UTC+1

🇫🇷

Paris

France

09:50:57 AM

Thu, Apr 30, 2026

UTC+2

🇦🇪

Dubai

UAE

11:50:57 AM

Thu, Apr 30, 2026

UTC+4

🇮🇳

Mumbai

India

01:20:57 PM

Thu, Apr 30, 2026

UTC+5:30

🇸🇬

Singapore

03:50:57 PM

Thu, Apr 30, 2026

UTC+8

🇯🇵

Tokyo

Japan

04:50:57 PM

Thu, Apr 30, 2026

UTC+9

🇦🇺

Sydney

Australia

05:50:57 PM

Thu, Apr 30, 2026

UTC+10

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

10:00 AM

🇫🇷 Paris

11:00 AM

🇦🇪 Dubai

01:00 PM

🇮🇳 Mumbai

02:30 PM

🇸🇬 Singapore

05:00 PM

🇯🇵 Tokyo

06:00 PM

🇦🇺 Sydney

07:00 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.

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?

Related Tools

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?

Related Tools