export type DateKey = string;
export type WeekStartsOn = 0 | 1;
export type CalendarDateInput = Date | string | null | undefined;
export type CalendarLocale = string | string[];
export type CalendarMonth = Date;
declare function toDateKey(date: Date): DateKey;
declare function parseDateKey(value?: string | null): Date | null;
declare function startOfMonth(date: Date): Date;
declare function addMonths(date: Date, amount: number): Date;
declare function isSameMonth(left: Date, right: Date): boolean;
declare function isBeforeDate(left: DateKey, right?: DateKey | null): boolean;
declare function isAfterDate(left: DateKey, right?: DateKey | null): boolean;
declare function isWithinRange(date: DateKey, from?: DateKey | null, to?: DateKey | null): boolean;
declare function getMonthLabel(date: Date, locale?: CalendarLocale): string;
declare function getWeekdayLabels(locale?: CalendarLocale, weekStartsOn?: WeekStartsOn): string[];
declare function getMonthDays(month: Date, weekStartsOn?: WeekStartsOn): CalendarMonth[];
export { addMonths, getMonthDays, getMonthLabel, getWeekdayLabels, isAfterDate, isBeforeDate, isSameMonth, isWithinRange, parseDateKey, startOfMonth, toDateKey, };