/**
 * Return the current month using the system timeZone.
 *
 * - Uses Temporal.Now.zonedDateTimeISO to get current month in system timezone.
 * - Returns zero-padded string (e.g., "02").
 * - Returns "" when system timezone is unavailable.
 *
 * @returns current month string (zero-padded) or "" on invalid
 *
 * @example getMonth() // "02"
 * @example getMonth() // "" (when system timeZone unavailable)
 */
export declare function getMonth(): string;