[null,null,["最后更新时间 (UTC):2024-11-26。"],[[["Cancellation windows control when users can cancel bookings, disappearing from interfaces when inactive."],["They can be set at the service level, affecting all slots, or at the slot level, overriding service settings."],["Service-level windows use `rules.min_advance_online_canceling` in the Service feed, specifying the minimum booking time in advance."],["Slot-level windows use `scheduling_rule_overrides.last_online_cancellable_sec` in the Availability feed, specifying the last cancellation timestamp."],["Implementing cancellation windows in feeds requires handling `BookingFailure` and `OUTSIDE_CANCELLATION_WINDOW` for edge cases."]]],[]]