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Time Zone Converter

Convert one wall-clock datetime between IANA zones and inspect the UTC instant it maps to

Safety note: Timezone conversion happens locally with the browser or runtime timezone database. This tool converts one wall-clock datetime between IANA zones; it does not schedule events or account for every business rule around DST.
Convert a local datetime between time zonesEnter the source datetime exactly as seen in one timezone, choose the source and target IANA zones, and review the UTC plus converted local time immediately
Use full IANA zone names such as America/New_York or Europe/London so the conversion can follow DST rules correctly.
What This Conversion Maps

This page treats your input as a local wall-clock time in the source timezone, maps it to one exact UTC instant, and then formats that instant in the target timezone.

Convert Between IANA Time Zones
  1. Enter the local date and time exactly as seen in the source timezone.
  2. Choose the source and target IANA zones.
  3. Click Convert timezone and compare the source, target, and UTC outputs together.
Why DST Can Break Assumptions

Some local times repeat or disappear during daylight-saving transitions. When that happens, a value that looks ordinary on the clock can fail to map cleanly to one exact UTC instant.