Time Zone Converter
Pick a city, a date and a time, then see the matching local time somewhere else.
New York, United States
10:00am
TUESDAY, OCTOBER 6, 2026 · UTC-4 · observes daylight saving
London, United Kingdom
03:00pm
TUESDAY, OCTOBER 6, 2026 · UTC+1 · observes daylight saving
How time zone conversion works
A time zone is not a fixed number of hours from UTC. Most regions shift by an hour for part of the year, and the dates they shift on differ: the United States and Europe change clocks on different weekends, so the gap between New York and London is five hours for most of the year but four hours for two short periods.
This converter reads the full rule set for each zone on the exact date you choose, which is why it stays correct around those transition weekends. If you are scheduling a recurring call, check a date in both summer and winter before you commit to a fixed slot.
Frequently asked questions
- Does the converter handle daylight saving time?
- Yes. Each conversion uses the IANA time zone rules on the exact date you pick, so a meeting in March or October converts correctly even when only one of the two cities has changed its clocks.
- Can I convert a time in the past or future?
- Yes. Choose any date. The offsets shown are the ones that apply on that date, not today's offsets.
- Why does the converted date sometimes change?
- Large offsets push the result into the previous or next calendar day. The converted date is always shown next to the time so you can see this at a glance.
- Is anything sent to a server?
- No. The conversion runs in your browser using its built-in time zone database.