What Is a Time Zone Converter?
A time zone converter lets you see the current time across multiple cities and zones simultaneously. Whether you're scheduling meetings across continents, coordinating remote team standups, or planning international calls, this tool shows you the exact time in every zone you care about — at a glance.
Working Across Time Zones
Remote teams span the globe. A time zone converter eliminates the mental math of 'what time is it in Tokyo right now?' Use it to find overlapping work hours between offices, avoid scheduling calls at someone's midnight, and coordinate release windows across regions. Bookmark your team's cities for instant reference.
How to Use This Tool
- Add your time zones — Search for a city or zone name and add it to your list. Popular choices like UTC, EST, PST, GMT, CET, and JST are available.
- View the current time — Each added zone shows its current local time, date, and UTC offset — updated in real time.
- Set a reference time — Adjust the time in one zone and all other zones update simultaneously, making it easy to find a time that works for everyone.
- Compare overlapping hours — Use the visual layout to identify the window where all your zones share normal working hours.
Worked example: a 9:00 New York meeting through 2026
The US and Europe change their clocks on different dates. In 2026 the US moves forward on March 8 and back on November 1; the UK and the EU move forward on March 29 and back on October 25. Here is a meeting fixed at 9:00 in New York, as seen in London and Tokyo (Japan has no daylight saving time):
| Date | London | Tokyo |
|---|---|---|
| Mar 2 (both on standard time) | 14:00 GMT | 23:00 |
| Mar 10 (US on DST, UK not yet) | 13:00 GMT | 22:00 |
| Mar 31 (both on summer time) | 14:00 BST | 22:00 |
| Oct 28 (UK back on GMT, US still on DST) | 13:00 GMT | 22:00 |
| Nov 3 (both on standard time) | 14:00 GMT | 23:00 |
For three weeks in March and one week in October-November the London time is an hour earlier than usual, and Tokyo moves twice a year even though Japan never changes its clocks. This converter uses your browser's time-zone database through Intl.DateTimeFormat, so it shows these shifts for any date you enter; check the weeks between the two switch dates whenever a recurring meeting crosses regions.
Computed October 11, 2026 with the IANA time-zone database (Python zoneinfo, America/New_York, Europe/London, Asia/Tokyo). Rules: NIST, Daylight Saving Time; EU Directive 2000/84/EC (summer time).
Related tools
- For previewing a cron schedule's next 10 fire times in a chosen IANA time zone, the Cron Next Fire Times tool handles 5-, 6-, and 7-field crontabs plus named days and @-shortcuts.
- For day-level age or interval calculations rather than timezone shifts, the Age Calculator reports an exact years-months-days span plus total weeks, days, and hours between any two dates.
- If you're scheduling around working hours rather than wall-clock hours, the Business Day Adder adds or subtracts business days while skipping weekends and US, UK, Canadian or Australian public holidays.
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools