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Convert local time with the edge cases intact

Enter a wall-clock reading and named zones. Ambiguous and nonexistent local times are explained instead of silently adjusted.

Conversion details

Conversion result
Choose a prepared case or enter one of the supported fixture instants, then convert it.

Fixture coverage

Prepared edge cases

These cases exercise the same result types the production Time Authority contract must provide.

  • A direct summer conversion with no clock ambiguity.

  • New York 01:30 occurs twice when daylight time ends.

  • New York 02:30 does not occur when daylight time begins.

Preview boundary: only reviewed fixtures are available. Arbitrary production calculation remains disabled.