World Clock
See the live, second-by-second current time in any number of cities side by side. It auto-detects your own time zone and pins it at the top of the board. No sign-up, no cap on cities, and daylight saving is handled automatically.
What is the World Clock?
The World Clock is a free online board that shows the live, second-by-second current time in as many cities and time zones as you want, all on one screen. It auto-detects your own time zone and pins it at the top of the board, then lets you add any other location so you can compare them at a glance. It is built for anyone who works, talks, or travels across regions and needs to know "what time is it there, right now?" without doing math in their head.
How to use it
- Open the page — your local time zone is detected automatically and shown first, highlighted as "Your time".
- Type a city or time zone name (for example "London", "Tokyo", or "America/New_York") into the search box and pick a match to add it to the board.
- Read each card: it shows the big live clock, the date in that place, the UTC offset, and a DST badge when daylight saving is in effect.
- Remove any city with its remove button. Your selection is saved in your browser, so the same board loads next time you visit.
The goal is simple: get the answer in one second and get back to what you were doing.
The method behind it
Every clock starts from a single source of truth — the actual current moment in time (UTC). For each city you add, the tool asks the browser's built-in time zone engine to express that same moment in the city's local time. A time zone is just an offset from UTC (for example UTC+9 for Tokyo), but that offset is not fixed: many regions shift by one hour during daylight saving time (DST). Because the calculation uses the browser's native IANA time zone database, those DST rules and transition dates are applied automatically — you never install or update anything, and the board never drifts out of date. A single per-second repaint keeps every clock on the board ticking in unison.
Examples
- You are in New York and add Tokyo: the board shows New York at 9:00 AM and Tokyo at 10:00 PM the same day — a 13-hour gap you can see instead of calculate.
- You add London in summer: the card shows a DST badge and UTC+1 (British Summer Time); in winter the same card shows UTC+0 automatically, with no action from you.
- You paste a shared link like /world-clock?cities=Europe/London,Asia/Tokyo,America/Los_Angeles and the board opens with those three cities already loaded next to your local time.
Common use cases
- Remote and distributed teams checking whether a colleague is in working hours before pinging them.
- Scheduling a meeting or call that spans several countries without booking it at someone's 3 AM.
- Travelers keeping an eye on "home time" while abroad so they can call family at a reasonable hour.
- Traders, gamers, and live-event viewers tracking when a market opens or a stream starts in another region.
Why use this one
Most world clocks cap how many cities you can pin, push you to create an account, or load slowly. This one lets you add unlimited cities to a single board, auto-detects and pins your own zone, requires no signup, and works instantly on mobile. It downloads no time zone data files because it uses the browser's native engine, so daylight saving is always handled correctly and your chosen cities stay private — they are saved only in your browser and never sent to a server.
It is part of a small, focused clock toolkit. To convert a specific date and time between two zones, use the Time Zone Converter. To count down to an event, the Countdown Timer runs a shareable live timer. And to translate machine timestamps into readable dates, the Unix Timestamp Converter handles epoch seconds both ways.
Frequently asked questions
Why does the time shown differ from my computer's clock?
Each clock is computed from your selected time zone using the browser's built-in Intl time zone engine, not from your device's manually set clock. If your computer's clock is wrong or set to the wrong region, its local time can differ from the correct zone time shown here. The pinned 'Your time' card uses the time zone your browser reports, which is usually correct.
Does the World Clock handle daylight saving time (DST) automatically?
Yes. Offsets and DST transitions come from the browser's native IANA time zone data, so when a region springs forward or falls back, the displayed time and the DST badge update automatically. There is nothing to install or adjust.
How many cities can I add to the board?
As many as you like. There is no cap and no account required. Search for any city or time zone, add it, and the board keeps every clock ticking live. Your selection is saved in your browser so it is restored next time you open the page.
Can I share a world clock with specific cities already loaded?
Yes. The page reads a list of zones from the URL, for example /world-clock?cities=Europe/London,Asia/Tokyo, and loads those clocks for you. Copy the URL after adding your cities to share the same board with a teammate.
Is my data private?
Yes. The World Clock runs entirely in your browser. Your chosen cities are stored only in your browser's local storage and are never sent to a server. There is no tracking, login, or upload.