Time zone converter
Pick a source city, a target, and a local time. The conversion uses IANA zone ids, so daylight saving on either side is applied for the date you choose — not a frozen offset from a screenshot.
New to time zones? Read what they are and how offsets work.
How this converter works
Civil time is UTC plus the offset that applies in that zone on that instant. When you convert 09:00 in London to New York, the library looks up Europe/London and America/New_York, including any spring-forward that already happened on the chosen date.
If you need a standing comparison rather than one timestamp, open a difference page for a curated pair, or read how to schedule across time zones. Do not type “EST” or “CST” into an invite; those abbreviations collide.
- Bangalore
- Thu 17 Sep 2026 01:25 (+05:30)
- Bangkok
- Thu 17 Sep 2026 02:55 (+07:00)
Worked examples (today)
- London → New York
- When it is 09:00 in London, it is 04:00 Thu in New York (+01:00 → -04:00).
- Bangalore → New York
- When it is 18:00 in Bangalore, it is 08:30 Thu in New York (+05:30 → -04:00).
- Tokyo → London
- When it is 09:00 in Tokyo, it is 01:00 Thu in London (+09:00 → +01:00).
Frequently asked questions
- How does the converter handle daylight saving?
- Conversions use IANA timezone rules for the date you pick. If either city observes daylight saving, the offset on that date is applied automatically—so a March meeting can differ from a November one.
- Should I convert from my city or the other person’s city?
- Either works. Set the city where the clock time is known as From, enter that local time, and choose the other city as To. Difference pages also show a fixed “when it is 09:00…” example.
- Why do some cities share the same result?
- Places that share an IANA zone (for example several cities on Asia/Shanghai) keep the same civil time. Pick a city in another zone when you need a real gap, or open a difference page such as London vs New York.