Time Zone Converter
Convert times between any two IANA time zones — handles daylight saving automatically.
Convert time between any two IANA time zones
Select a date, a time, and a source time zone, then pick the destination zone. The converted time and UTC offset appear immediately. The tool uses the browser's built-in Intl.DateTimeFormat API, so it respects daylight saving transitions correctly without any external library — a summer time in New York will correctly show UTC-4, not UTC-5. Nothing is sent to a server; all conversion happens in your browser.
The source and destination lists include 29 common IANA zone identifiers covering every major region. IANA names are more precise than abbreviations like "EST" or "PST" because they encode the full historical DST rule set.
FAQ
Why do I see a different offset in summer vs. winter? Many zones observe daylight saving time (DST), which shifts the UTC offset by one hour. The tool always uses the correct offset for the specific date you entered.
My zone is not in the list — what should I do? Type any valid IANA identifier directly into the select box if your browser allows it, or consult the IANA Time Zone Database to find the canonical name for your region.
What happens at the DST boundary? At spring-forward gaps the tool maps to the post-gap time. Ambiguous fall-back times resolve to the first occurrence (standard time).