CALCULATOR · IANA TIME ZONES
Time-zone converter
Convert a specific local date and time between IANA zones. UTC offsets and daylight-saving rules come from your browser's time-zone database — no hardcoded offsets.
Local only · no API · no upload時區換算
Search the same field by country in Chinese or English, city, ISO country code, common aliases such as USA/UK, or IANA zone.
This clock time occurs twice because daylight saving time is ending. Pick which occurrence you mean.
Converted time
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DST, ambiguity, and browser limits
- Spring-forward gaps create local clock times that never occur. The converter rejects those times instead of guessing.
- When fall-back repeats a clock time, choose the first or second occurrence before using the result.
- Results depend on the IANA time-zone data shipped with your browser or operating system. Very old browsers may have older rules.
- No date, time, zone, or result is written to the URL or browser storage.