Convert an ISO instant with an explicit offset into an IANA time zone.
Type or paste on the left — the result updates as you type.
Uses the browser’s time-zone database, including historical daylight saving. Ambiguous local times must be entered with an explicit offset.
Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.
Tool page updated: 2026-09-27
