/**
 * To ISO date string.
 * @param date date object.
 * @return ISO date.
 */
export declare function toISODateString(date: Date): string;
/**
 * DaysAgo function returns a date for the given days ago.
 * @param days days ago.
 * @return date object.
 */
export declare function daysAgo(days: number): Date;
/**
 * DaysLaterFrom function returns a date later from given
 * date in given days.
 * @param date date object.
 * @param days days later.
 * @return date object.
 */
export declare function daysLaterFrom(date: Date, days: number): Date;
/**
 * ToMonthAndDay function returns string representation of
 * the date as month and day.
 * @param date date boject.
 * @return month and day string.
 */
export declare function toMonthAndDay(date: Date): string;