/**
 * Converts a Gregorian date to Hijri (Islamic) date.
 * @param {Date} date - JS Date object
 * @param {number} adjustment - Day offset for regional correction
 * @returns {{hYear:number,hMonth:number,hDay:number}}
 */
export function toHijri(date: Date, adjustment?: number): {
    hYear: number;
    hMonth: number;
    hDay: number;
};
/**
 * Converts a Hijri date to Gregorian date.
 * @param {number} hYear - Hijri year
 * @param {number} hMonth - Hijri month (1–12)
 * @param {number} hDay - Hijri day (1–30)
 * @param {number} adjustment - Day offset for regional correction
 * @returns {{gYear:number,gMonth:number,gDay:number}}
 */
export function toGregorian(hYear: number, hMonth: number, hDay: number, adjustment?: number): {
    gYear: number;
    gMonth: number;
    gDay: number;
};