import type { Dayjs } from 'dayjs';
export declare const DATE_FORMAT = "YYYY-MM-DD";
export declare const generateCalendar: (firstDayOfMonth: Dayjs) => {
    date: Dayjs;
    isCurrentMonth: boolean;
}[][];
export { namesOfDays } from '../calendar/helper';
export declare const getTimeRange: <D extends string | null | undefined>(start: D, end: D) => {
    startAt: Dayjs | null;
    endAt: Dayjs | null;
};