Time & Scheduling
Time Zone Converter
Convert a local date and time between IANA time zones with daylight-saving changes handled correctly.
How to use this time zone converter
Enter a local date and time in the source zone, choose one or more target zones, and inspect each local time and UTC offset. All calculations happen in your browser.
Daylight saving time and IANA zones
The converter follows IANA time-zone rules for daylight saving. A skipped local time is reported; when clocks move back and a time occurs twice, the earlier occurrence is selected by default.
Frequently asked questions
What happens during a daylight-saving transition?
When clocks move forward, some local times do not exist and the tool asks for a valid time. When clocks move back, some times occur twice and the earlier occurrence is selected by default.
What is an IANA time zone?
IANA identifiers use a “region/city” form such as Asia/Shanghai, Europe/London, and America/New_York. They preserve historical and daylight-saving rules better than a fixed UTC offset.