export declare type DateObject = {
    year?: number;
    month?: number;
    day?: number;
    weekday?: number;
    hour?: number;
    minute?: number;
    second?: number;
    millisecond?: number;
};
/**
 * Returns the minimum (most distant past) of the given date values.
 * @template T
 * @param {Array<T>} dates
 * @returns {T} The smallest date of `dates`
 */
export declare function minDate<T>(dates: Array<T>): T;
/**
 * Returns the maximum (most distant future) of the given date values.
 * @template T
 * @param {Array<T>} dates
 * @returns {T} The largest date of `dates`
 */
export declare function maxDate<T>(dates: Array<T>): T;
/**
 * Returns `true` if the year is a leap year, otherwise `false`.
 * @param year The date year
 * @returns {boolean} `true` if is a leap year
 */
export declare function isLeapYear(year: number): boolean;
/**
 * Get the number of days in the given year.
 * @param year The date year
 * @returns {number} Number of days in year
 */
export declare function daysInYear(year: number): number;
/**
 * Get the number of days in the given date's month and year.
 * @param date The specified date
 * @returns {number} Number of days in month
 */
export declare function daysInMonth(date: string | number | Date): number;
export declare function asNumber(value: any): number;
export declare function parseISODuration(s: any): any;
/**
 * Returns the number of weeks in the specified year.
 * @param year
 * @param firstDayOfWeek
 * @param firstDayOfYear
 */
export declare function weeksInYear(year: number, firstDayOfWeek?: number, firstDayOfYear?: number): number;
/**
 * Returns the week of the year for the specified date
 * @param year
 * @param dayOfYear
 * @param firstDayOfWeek
 * @param firstDayOfYear
 * @returns
 */
export declare function weekOfYear(date: string | number | Date, firstDayOfWeek?: number, firstDayOfYear?: number): {
    week: any;
    year: any;
};
export declare function isoWeeksInYear(year: number): number;
export declare function dayOfYear(input: string | number | Date): number;