Time Zone Converter
Interpret the date and time as local in the from zone, then show it in the to zone. DST is the zone database in this browser.
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How to convert a time zone
- Enter a date and time without a zone, or tap Use now.
- Set the zone that time is local in, then the zone you want to read.
- Swap zones to reverse the conversion.
- Read both clocks, offsets, UTC, and how far the to zone is ahead at that instant.
Time zone conversion
IANA zone conversion via Intl
| Zones | IANA names such as America/New_York |
|---|---|
| DST | Uses this browser's timezone database |
| Not included | One URL per city, or live flight times |
What this converter does
The datetime is treated as wall time in the from zone, then formatted in the to zone. DST uses this browser's IANA timezone database via Intl. This device (local) uses the zone Intl reports for the browser. There is no separate page per city and no weather feed.
DST folds and gaps
When a local time happens twice (fall back) or does not exist (spring forward), this page follows what Intl does after a two-pass offset fix. That is the same approach used by serious browser time converters. If the combination is invalid, you get an error instead of a silent wrong hour.
Unix timestamps and other formats
If you have seconds or milliseconds since epoch, or you need HTTP / RFC 1123 and SQL UTC strings, use the Unix timestamp converter. That page is the CZNull counterpart to a general time converter's numeric and standard-string outputs.