declare enum DayOfWeek {
    Sunday = 0,
    Monday = 1,
    Tuesday = 2,
    Wednesday = 3,
    Thursday = 4,
    Friday = 5,
    Saturday = 6
}
declare const DAYS_IN_WEEK = 7;
declare function startOfDay(date: Date): Date;
declare function endOfDay(date: Date): Date;
declare function startOfWeek(date: Date, firstDayOfWeek?: DayOfWeek): Date;
declare function endOfWeek(date: Date, firstDayOfWeek?: DayOfWeek): Date;
declare function startOfMonth(date: Date): Date;
declare function endOfMonth(date: Date): Date;
declare function addDays(date: Date, amount: number): Date;
declare function addWeeks(date: Date, amount: number): Date;
declare function addMonths(date: Date, amount: number): Date;
declare function daysInMonth(date: Date): number;
declare function weeksInMonth(date: Date, firstDayOfWeek?: DayOfWeek): number;
declare function toDateISOString(date: Date): string;
declare function makeFormatters(locale: string): {
    title: (date?: number | Date | undefined) => string;
    weekdayShort: (date?: number | Date | undefined) => string;
    weekdayLong: (date?: number | Date | undefined) => string;
    cellDate: (date?: number | Date | undefined) => string;
};
export { DayOfWeek, DAYS_IN_WEEK, startOfDay, endOfDay, startOfWeek, endOfWeek, startOfMonth, endOfMonth, addDays, addWeeks, addMonths, daysInMonth, weeksInMonth, toDateISOString, makeFormatters, };