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 isValidJalaaliDate(jy: number, jm: number, jd: number): boolean

  export function isLeapJalaaliYear(jy: number): boolean

  export function jalaaliMonthLength(jy: number, jm: number): number
}