A holiday-mode window to apply. startDate/endDate are ISO 8601
wall-clock strings in the caller's timezone; both are ignored when
isEnabled is false. The start is always explicit (the Home API
carries no timezone context to anchor a "now" default), so callers
pass the full window.
A holiday-mode window to apply.
startDate/endDateare ISO 8601 wall-clock strings in the caller's timezone; both are ignored whenisEnabledisfalse. The start is always explicit (the Home API carries no timezone context to anchor a "now" default), so callers pass the full window.