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Burrows Tools

Time Zone Converter

Pick a date and time, pick two zones, and read the answer — with the UTC offset, the zone's short name, and a badge when the other zone has already rolled over to the next day. The zone list is the one your own device carries: it comes from the browser's built-in Intl data, so it tracks your operating system's updates rather than a snapshot bundled into this page, and every IANA zone is in it. Daylight saving is the part that quietly ruins meeting invitations, so it is handled out loud: a clock time that a spring-forward transition skipped is flagged instead of silently shifted, and one that a fall-back transition repeats says so and uses the earlier of the two. Underneath the converter, a world clock ticks through the current time in your two zones and eight major ones. Every calculation happens in this tab — no date, no zone, and no request leaves your browser.

Coordinated Universal Time

Europe

Reading your time zone…

Current time around the world
ZoneTimeDateOffset
Reading your clock…

How to use the time zone converter

  1. Set the 'From' zone — it starts on the zone your device is set to — by typing a city and picking from the list.
  2. Set the 'To' zone the same way, or press Swap to reverse the two.
  3. Enter the date and time as it reads on the clock in the 'From' zone.
  4. Read the converted time, its offset, and any next-day badge, then copy it or copy the equivalent UTC timestamp.

Frequently asked questions

Where does the time zone data come from?
From your browser. Intl.DateTimeFormat ships with the IANA time zone database as part of your operating system or browser, so this page needs no time zone library and no server call. It also means the rules update when your device updates, which is how a page stays correct after a country changes its daylight saving dates.
What happens on a daylight saving change?
Two things can go wrong on those two days a year, and both are reported. When clocks spring forward, an hour of local time never happens — 2:30 AM on that morning in New York does not exist — so the tool says so and uses the first real time after the gap. When clocks fall back, an hour repeats, so the tool says so and converts the first (still daylight-saving) occurrence.
Why does the result say +1 day?
Because the two zones are on different calendar dates at that moment. 8 PM in Los Angeles is noon the following day in Tokyo, and losing that detail is the classic way a meeting gets booked 24 hours out. The badge appears whenever the target zone's date differs from the source zone's.
Can I search by city instead of by zone name?
Yes. The picker matches on the city part of an identifier, so typing 'tokyo' finds Asia/Tokyo and 'york' finds America/New_York. Zones are named after a representative city rather than a country because a single country can span several zones and change them independently.
Is anything I enter sent to a server?
No. The conversion, the zone list, and the world clock all run in your browser, so this page works offline once loaded and keeps whatever meeting time you are planning to yourself.

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