Time Zone Converter
Convert local times between cities around the world. Daylight-saving changes are applied for the date you choose, and you can compare several cities against the same moment.
From — source
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To — destination
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Converted time appears here
Enter a source date and time to see the conversion.
Technical details
- Source local time
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- Source zone (IANA)
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- Source UTC offset
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- Resolved instant (ISO 8601, UTC)
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- Destination local time
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- Destination zone (IANA)
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- Destination UTC offset
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Compare multiple cities
Every row shows the same instant as the source time above, in that city's local time. Up to 8 cities.
How the converter works
The converter reads the date and wall-clock time you enter, interprets them in the source time zone you selected, and finds the exact moment they describe. That moment is then displayed in the destination zone. Offsets come from your browser's time-zone rules, so the results account for daylight-saving time on the date you choose.
What is a UTC offset?
A UTC offset is how far a local time is ahead of or behind Coordinated Universal Time (UTC) at a particular moment. Offsets can differ between two dates in the same place when clocks change seasonally.
Why can the date differ in another country?
The same moment can be late in the evening in one city and already the following morning in another. The result shows whether the destination is on the same, previous, or next calendar day.
Daylight-saving gaps and overlaps
When clocks move forward, some local times do not exist on that day, and the converter asks you to choose a valid time. When clocks move back, some local times happen twice; the converter asks which occurrence you mean.
Frequently asked questions
What is an IANA time-zone identifier?
Identifiers such as Asia/Kolkata or America/New_York name a set of time rules, including historical and seasonal changes. They are more reliable than abbreviations like IST or EST, which can be ambiguous.
Can I convert a future or past date?
Yes. The result uses the time-zone rules available in your browser for the date you select. Future legal changes to time rules can alter results for dates far ahead, and very old historical offsets depend on your browser's data.
Is my time information sent to a server?
No. Conversions are calculated in your browser, and no network request is needed for them. The only setting stored is your theme preference.
Why does the tool ask me to choose an occurrence?
During a daylight-saving fall-back, the same clock time occurs twice. Without a choice, the converter could return a different moment than you intended.