/**
 * A React hook that safely returns the user's local timezone (e.g., "America/New_York").
 * It is SSR-safe and guarantees hydration matches by initializing to `null` on the server.
 *
 * @returns {string | null} The timezone string from `Intl.DateTimeFormat`, or `null` during server-side rendering.
 */
export declare function useTimezone(): string | null;
export default useTimezone;