import type { HoursTypeInt } from "../../types/clock/hoursTypeInt";
import type { DayType } from "../../types/date/dayType";
import type { MonType } from "../../types/date/monType";
export type BIRTHDAYSIMPLE = <T extends MonType>(birthdays: Date | `${number}-${T}-${DayType<T>}` | `${number}:${T}:${DayType<T>}` | `${number}/${T}/${DayType<T>}` | {
    year: number;
    mon: number;
    day: number;
}, timeDifference?: HoursTypeInt) => number;
/**
 * Calculate age from birthdate
 * @param birthdays - Birthday date in various formats
 * @param timeDifference - Time zone difference in hours (default: 9)
 * @returns Age in years
 * @example birthdaySimple("2000-01-01");
 * birthdaySimple("2000:01:01");
 * birthdaySimple("2000/01/01");
 * birthdaySimple({ year: 2000, mon: 1, day: 1 });
 * birthdaySimple(new Date(2000, 0, 1));
 */
export declare const birthdaySimple: BIRTHDAYSIMPLE;