Conformance

@callstack/timezone-hermes-fix

native-seam only — upstream JS and useTimezoneHermesFix run from the bundle against the TimezoneHermesFix TurboModule. peach returns the real Intl timezone, GMT offset, DST flag, and ICU zone list; the Hermes timezone-cache reset is intentionally inert outside Hermes.

90%

API coverage

No visual conformance cases have been published for this package yet. The registry summary below describes what the compat layer implements.

Working (4)

getCurrentTimeZone (Intl name, longOffset secondsFromGMT, january/july DST detection)getSupportedTimeZones (Intl.supportedValuesOf)onTimezoneChange subscribe/remove contractuseTimezoneHermesFix initial value

Missing (2)

onTimezoneChange never fires (no browser system-timezone change event); the supported list is the browser ICU listnot NSTimeZone knownTimeZoneNames; isDaylightSavingTime is inverted for negative-DST zones such as Europe/Dublin