Time zone converter

Convert a date and time between IANA zones or fixed UTC offsets.

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Use the example values or enter your own measurements.
Calculate, then copy the result or download the available details.

Example

Input

2026-01-15 09:00, Asia/Shanghai → America/New_York

Expected result

2026-01-14 20:00:00

Try it

Good to know

The calculation runs in your browser. Use consistent units in fields with no explicit unit.

Calculation method

IANA zones use the browser’s time zone rules. A repeated hour has two possible instants; a skipped hour has none. A fixed UTC offset stays constant throughout the year.

T_{\rm target}=T_{\rm source}-O_{\rm source}+O_{\rm target}

Calculation mode

IANA

Date
Local time
Source IANA zone
Target IANA zone
Repeated hour · Earlier occurrence / Later occurrence

Fixed UTC offsets

Date
Local time
Source offset
Target offset