declare module 'jalaali-js' {
  export function toJalaali(
    gy: number,
    gm: number,
    gd: number,
  ): {
    jy: number;
    jm: number;
    jd: number;
  };
  export function toGregorian(
    jy: number,
    jm: number,
    jd: number,
  ): {
    gy: number;
    gm: number;
    gd: number;
  };
  export function isLeapJalaaliYear(jy: number): boolean;
  export function jalaaliMonthLength(jy: number, jm: number): number;
}