What is World Clock?
World Clock is a world clock that shows the current time in multiple countries and cities on a single page, in real time. It lets you see time differences at a glance when coordinating overseas deals, remote work, studying abroad, or travel schedules. All calculations happen inside your browser, and no data is sent to any server.
Key Features
Multi-time-zone board
Compare the current time in multiple cities side by side on one screen, in real time (to the second).
Freely add and remove cities
Search for major cities worldwide to add and remove them freely, and your selection is saved automatically.
5 clock themes
Choose the clock style you like from digital, analog, flip, minimal, and LCD.
8 color themes
Change the screen colors to your taste with 8 dark and light palettes.
Choose your layout
Adjust the size and number of columns of the clock cards with 1×2, 1×3, 2×2, and 3×2 layouts.
Automatic day/night and DST
Each city's day or night is shown with an icon, and daylight saving time is applied automatically from your browser's time-zone data.
How to Use
- Tap ‘Add city’ to search for and select the country and city you want.
- In the controls at the top, pick a clock style (digital, analog, and so on) and a color theme.
- Choose your preferred layout from 1×2, 2×2, or 3×2 to adjust the card size.
- You can toggle 24-hour/12-hour and the seconds display on or off, and your settings are saved automatically.
Frequently Asked Questions
Is the time accurate?
We use your browser (device) clock and standard IANA time-zone data to calculate the current time in each city. As long as your device's time is accurate, every city's time is accurate too.
Is daylight saving time applied automatically?
Yes. Each city's DST status and transition dates are applied automatically from your browser's time-zone data, so there's no need to calculate anything yourself.
Are my selected cities and settings saved?
Yes. The cities you add, the clock theme, color theme, layout, and options are saved automatically in your browser and kept as they were on your next visit.
Do I need to sign up?
No. You can use it right away with no installation or login, and all processing happens inside your browser.
How many cities can I add?
There's no limit. That said, for on-screen readability we recommend using around 6 to 9 cities to match the layout.