World Time Converter

Compares the time in several cities and the differences between them; change the time in the base city and the others follow. Use it to plan an international meeting at an hour when everyone is at work.

How to use

1. Type a city, country or time zone, such as Paris, Japan or UTC, in the "Add a city" box and press a result.
2. The city at the top is the base. To use another city as the base, press its "Make base" button.
3. Change the base city's date and time, and every city shows that moment. "Now" returns to the current time.
4. Check the hours under "When everyone is at work", and change "Work starts" and "Work ends" under "Settings".

How it works

• Times come from the IANA time zone data built into your browser, so daylight saving time is applied automatically. Cities on daylight saving time are marked.
• Working hours are 09:00 to 18:00 by default, without Saturday and Sunday. Tap a bar to jump to that time.
• There are 136 built-in cities. Your city list and settings are saved in this browser on this device.

Questions and answers

What is the time difference between Seoul and New York?

Add both cities and make Seoul the base; the New York row shows the difference for the chosen date. With daylight saving time, the difference can change by one hour with the season.

Is daylight saving time taken into account?

Yes, for the chosen date. If you enter a time that is skipped when daylight saving time starts, it is moved to a valid time and a note says so.

How do I find a meeting time across countries?

Add the city of every participant. Each city's working hours appear as a bar, and the shared hours are listed in the base city's time. If there are none, widen the working hours.

What is UTC?

Coordinated Universal Time, the reference for all time zones. Each zone is written as its difference from UTC, such as UTC+9 or UTC−5.