export type DeliveryWindowTimezone = {
    /** The detected IANA timezone, or undefined when it could not be detected. */
    timezone: string | undefined;
    /** Whole-hour offset from UTC, or null when the timezone is unknown. */
    offsetHours: number | null;
    /** True when we could not detect a timezone and should display raw UTC. */
    isUtcFallback: boolean;
};
/**
 * Detect the device timezone (via `guessTimezone`) and derive the whole-hour
 * offset used to convert delivery windows between UTC and local time.
 *
 * When the timezone cannot be detected, `isUtcFallback` is true and callers
 * should display the raw UTC values with a clear "UTC" label.
 */
export default function useDeliveryWindowTimezone(): DeliveryWindowTimezone;
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