What is the difference between a time zone and a UTC offset?
An IANA time zone such as America/New_York contains clock-change rules that depend on the date. A fixed offset such as UTC−05:00 always remains five hours behind UTC.
Time tool
Time zone converter
Convert dates and times between places or time zones, including UTC and fixed offsets.
This tool requires JavaScript.
Time zone converter
From
Selected: Device time zone —:—Now
To
Selected: Global reference time —:—Now
Search by city, IANA time zone, abbreviation such as PST, or UTC offset.
Date and time
This wall-clock date and time belongs to the selected source.
Converted time
Converted- Your local time:
- Open: Home — Your local time: — —
Source time
Time
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Date
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- The UTC offset at the selected instant. It can change with daylight saving time or other local clock changes
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- The clock rule in effect at the selected instant: a fixed UTC offset, standard time, or daylight saving time. A different rule may apply at another time of year
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Time difference
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Destination time
—Time
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Date
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—- The UTC offset at the selected instant. It can change with daylight saving time or other local clock changes
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- The clock rule in effect at the selected instant: a fixed UTC offset, standard time, or daylight saving time. A different rule may apply at another time of year
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Other formats
- ISO 8601 is an international date and time format. A common UTC example is 2026-05-21T15:48:50.777Z
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- Seconds since January 1, 1970 UTC
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24-hour comparison
| Source time | Destination time |
|---|---|
| — | — |
Future times use currently known time-zone rules, which may change.
Time zone converter FAQ
Why can a local time be missing or occur twice?
Daylight saving changes can skip a range of local clock readings in spring or repeat them in autumn. The converter reports a missing time or asks you to choose the intended occurrence.
Can I use abbreviations such as CST or IST?
You can search by abbreviation, city or IANA identifier. Abbreviations may match several time zones; check the place and time zone before selecting.