interface currentDate { currentYear: number; currentMonth: number; currentDay: number; } declare function adToBs(adDate: string): string | currentDate; declare function bsToAd(selectedDate: string): string; declare function ageCalculator(bsDate: string): { year: number; month: number; day: number; }; export { adToBs, bsToAd, ageCalculator as calculateAge };