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Світовий годинник

Додайте міста, щоб порівняти їхній поточний місцевий час, дати та зсуви з першого погляду.

Як працює Світовий годинник

The world clock shows the current local time in the cities you pick, side by side and ticking live. Add the places you work with, see at a glance who is already on tomorrow’s date or still on yesterday’s, and read the hour offset against your own clock. Your selection is saved on your device, so the page opens straight onto your cities next time.

Everything comes from the time zone database that ships inside your browser: daylight saving rules included, no server lookup, no account. Once the page has loaded it keeps working offline, which also means the times are exactly as trustworthy as your device clock.

Поширені запитання

Are my files uploaded to a server?

No. There is nothing to upload in the first place: the page asks your browser’s built-in time zone database (the same one your operating system uses) for each city’s current time and renders it locally. Your city list is stored in your browser’s localStorage and never leaves your device. Open DevTools, watch the Network tab: after the page loads, no requests are made at all.

Where do the times come from? Are they accurate?

From your own device. The browser ships the full IANA time zone database, including daylight saving rules, and applies it to your device clock. If your device clock is right, every city time is right. There is no server synchronisation: a wrong system clock will show every city shifted by the same amount.

Does it handle daylight saving time?

Yes, automatically. The IANA database in your browser knows each region’s DST rules and applies them for the date in question, so a city switches to summer or winter time exactly when it does in real life.

Is my city list saved?

Yes, in your browser’s localStorage, on your device only. Clearing site data resets the list to the defaults. Nothing is synced anywhere.

Does it work offline?

Yes, once the page has loaded. Because the processing happens on your device, you can disconnect from the network and the tool keeps working. This is the clearest proof that your data never leaves your machine.

Is it free? Do I need an account?

It is completely free and requires no sign-up. There are no watermarks, no daily limits and no tracking cookies needed to use the tool.

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