type BSDate = {
    year: number;
    month: number;
    day: number;
};
/**
 * Calculates the age in years, months, and days between a Date of Birth (dob)
 * and a reference date (defaults to the current local date in Nepal) within the BS calendar.
 */
export declare function calculateAgeBS(dobInput: Date | string | number | BSDate, refInput?: Date | string | number | BSDate): {
    years: number;
    months: number;
    days: number;
};
export {};