Time Zone Converter
Convert local times between time zones.
What this calculator does
Convert a dated local time between supported IANA time zones with date-specific daylight-saving offsets.
Inputs and what they mean
- Date and local time
- — datetime-local value.
- From time zone
- — choice value.
- To time zone
- — choice value.
- Time format
- — 12 or 24 hour value.
How to use it
- Enter the dates, times, or schedule details.
- Adjust the available options for your situation.
- Review and copy the instant result.
Formula
Resolve the entered wall-clock time to an instant using its IANA zone, then format that same instant in the destination zone.
Worked example
New York to London
Convert a local time while applying the correct date-specific offsets.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.
Common questions
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