Time Zone Converter
Convert a time between major world time zones.
How to use the Time Zone Converter
Enter your values and pick a mode if the tool offers one.
Click calculate — results appear instantly, computed in your browser.
Copy the result or save the tool to your favorites.
Frequently asked questions
A selection of major zones via the browser’s timezone database.
A time in your local zone; it converts to the chosen zone.
It uses the browser’s zone data, which accounts for DST.
Yes, the converted date and time are shown.
Entirely in your browser. Your data is never uploaded to a server.
About the Time Zone Converter
This tool converts a date and time from your local zone into another major world time zone. Enter a moment in your own time, choose a destination city, and see the equivalent local time there, taking daylight saving into account.
Why time zones exist
Because the Earth rotates, the sun is overhead at different places at different moments, so a single global clock would put noon in the middle of the night for half the world. Time zones divide the planet into regions that keep a common local time, roughly aligned so that midday falls near when the sun is highest. Most zones differ from the universal reference, UTC, by whole hours, though some differ by thirty or forty-five minutes, reflecting political and geographic choices rather than pure astronomy.
The complication of daylight saving
Many regions shift their clocks forward in summer and back in winter to make better use of daylight, a practice called daylight saving time. This means the offset between two places is not fixed; it can change depending on the date, and the two regions may not switch on the same day, creating brief periods where the usual difference is off by an hour. This is exactly the kind of error that causes missed international calls and meetings. The converter uses your browser's built-in timezone data, which tracks these rules, so the result accounts for daylight saving automatically.
Common uses
Remote teams use it to schedule meetings across continents without anyone miscalculating. Travellers use it to know what time it is at their destination or back home. People arranging international calls, watching live events broadcast from abroad, or coordinating deadlines across borders all need to convert time zones reliably. A small error here has outsized consequences, so doing it accurately matters.
How to use it
Enter your local date and time, then pick the destination zone from the list of major cities. The converter shows the corresponding date and time there. Because it includes the date, it also makes clear when a conversion crosses midnight into the previous or next day, which is easy to overlook and a frequent source of scheduling mistakes.
Tips and related tools
When scheduling, always confirm the date as well as the time, since large offsets can push an event onto a different calendar day. If a partner region is near a daylight saving changeover, double-check close to the date. For converting Unix timestamps see the Timestamp Converter, and for reformatting dates the Date Converter. Conversion runs in your browser.