World Clock
A live world clock showing the current time in as many cities as you like, each ticking every second with its date and UTC offset. Add or remove cities freely. Runs in your browser.
World clock
How it works
Each city shows the current time in its own zone, ticking every second against your device clock. Times are derived from your browser's built-in time-zone database, so daylight saving is applied automatically for every city.
Add or remove as many cities as you like. Everything runs locally in your browser, nothing is saved or sent anywhere.
What this does
A world clock shows the current time in as many cities as you like, each ticking every second with its date and UTC offset.
How to use it
- Pick a city or time zone.
- Press Add to include it.
- Remove any city with the × button.
- Watch every clock tick live.
How it works
Each city’s time and offset come from your browser’s time-zone database through the standard Intl API, so daylight saving is applied automatically and no external service is contacted.
Understanding your result
Each city ticks from your browser time-zone database, so daylight saving is applied automatically and the UTC offset shown is the rule in force on todays date, it can shift by an hour across a DST changeover. Because every clock is driven by your one device clock, the cities stay perfectly in sync with each other even if that underlying device clock is itself slightly wrong.
Example
Add Tokyo, London, and New York to compare the working day across three continents at a glance.
Sources & methodology
Last updated .
Frequently asked questions
Can I add my own cities?
Yes. Pick any zone from the list and press Add; remove any city with the × button. Your local zone and a few common ones are shown by default.
Is daylight saving handled?
Yes. Each city’s time and offset come from your browser’s time-zone database, so daylight saving is applied automatically.
Is my data stored?
No. The clock runs locally in your browser and nothing is saved between visits.
Related tools
City to City Time Difference
See the live time difference between any two cities, how many hours one is ahead of or behind the other, with the current local time and UTC offset for each. Calculates in your browser.
Local Time Finder
Find the current local time in any city or time zone, with its date, UTC offset and how far ahead or behind it is from your own time. Updates live in your browser.
Meeting Planner
Plan a meeting across time zones with a 24-hour grid that lines up every city’s local hours and highlights the slots where everyone is within working hours. Calculates in your browser.
Time Zone Abbreviations
A searchable reference of common time-zone abbreviations (EST, PST, GMT, CET, IST and more) with their full names, UTC offsets and where they’re used.