Time Zone Converter
Frequently Asked Questions
How time zone conversion works
How does time zone conversion work?
The tool uses the browser's Intl.DateTimeFormat API, which natively supports all time zones in the IANA database (e.g. Europe/Rome, America/New_York). This ensures automatic daylight saving time (DST) handling for each zone. No external library is used.
Is daylight saving time handled automatically?
Yes. The Intl.DateTimeFormat API automatically handles the switch to daylight saving time (DST) for each zone. For example, New York is UTC-5 in winter (EST) and UTC-4 in summer (EDT), and the tool shows the correct offset for the entered date.
Which time zones are supported?
The tool shows 9 main zones: UTC, Rome, London, New York, Los Angeles, São Paulo, Dubai, Tokyo and Sydney. They cover the main global financial and commercial centres. The browser supports the entire IANA database with over 400 zones.
How do I find the time for an international meeting?
Enter the time and select your time zone as the source. The tool will automatically show the corresponding time in all other zones. For example, a call at 15:00 in Rome corresponds to 09:00 in New York and 23:00 in Tokyo.
Is daylight saving handled?
Yes, the conversion uses the time zone database of the browser, which knows when each country changes its clocks. New York comes out five hours behind in winter and four in summer.
Which time zones are available?
The nine zones that come up most often are listed, from Rome to London, New York, Los Angeles, Sao Paulo, Dubai, Tokyo and Sydney, alongside UTC. They cover the main places people work with.
How do I find the right time for a call?
You type the time in your own zone and read it off in the others: three in the afternoon in Rome is nine in the morning in New York and eleven at night in Tokyo.