Timezone Converter
Pick a time in one city, see it everywhere else.
Reference time (UTC slider)
Fri, 22 May 2026 10:54:56 GMT
Your time (UTC)
UTC · GMT+0
10:54 AM
Fri, May 22
San Francisco
America/Los Angeles · GMT-7
3:54 AM
Fri, May 22
New York
America/New York · GMT-4
6:54 AM
Fri, May 22
London
Europe/London · GMT+1
11:54 AM
Fri, May 22
Karachi
Asia/Karachi · GMT+5
3:54 PM
Fri, May 22
Tokyo
Asia/Tokyo · GMT+9
7:54 PM
Fri, May 22
Add a city
About Timezone Converter
Side-by-side timezone comparator.
Scheduling across time zones is one of those tasks that should be trivial and never is — daylight savings shifts, the date line, half-hour offsets in India and Iran, the lone fifteen-minute offset of Nepal. This converter shows a slider that you drag in one city, and updates every other city you've added in real time. Built for meeting planning, on-call rotations, and async team coordination.
How the time math works
Every conversion uses the IANA Time Zone Database (the same database that powers Linux, macOS, JavaScript's `Intl.DateTimeFormat`, and most server-side time libraries). DST transitions are encoded per-zone with effective dates, so a 3pm in New York correctly converts to 8pm in London during US summer time and 9pm in London the rest of the year. Cities with fixed offsets (UTC+5:30 for India, UTC+5:45 for Nepal) are handled correctly.
Frequently asked questions
Quick answers to the questions people actually ask about Timezone Converter.
Does it handle daylight savings transitions?
Does it handle daylight savings transitions?
Yes — every conversion uses the IANA Time Zone Database. A 3pm meeting in New York during US summer time correctly maps to 8pm London; the same meeting in winter is 9pm London. The half-hour offsets in India and Iran, the quarter-hour offset in Nepal — all handled.
Can I share a converted time as a link?
Can I share a converted time as a link?
Not yet — the comparison view doesn't yet round-trip through the URL. Workaround: screenshot, or send the UTC time alongside city times in plain text.
Is it accurate for historical or future dates?
Is it accurate for historical or future dates?
Yes for any date between 1970 and ~2030. Historical DST rules vary widely (the US has changed DST rules five times since 1970), and IANA encodes all of those. Future dates beyond ~2030 use the current rules and could shift if a country changes policy.