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Time Runs offline

Timezone Converter

Convert a time between any two time zones, DST included.

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Questions
Why use IANA zone names instead of UTC offsets?
An offset like UTC+2 is only correct for part of the year in most places. A zone name such as Europe/Berlin encodes the full history of that region's offset and daylight-saving rules, so conversions stay correct across DST transitions and past rule changes.
How is daylight saving handled?
By the browser's built-in IANA time zone database, via the Intl API. The tool shows whether the converted time falls inside a DST period, which is what makes an unexpected one-hour difference explicable rather than mysterious.
        
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