import { Week } from '../DateRangePicker/DateRangePicker';
import { ReferenceMonth } from '../MonthPicker';
/**
 * Calculate the first day of a month.
 *
 * @param target Target month.
 * @returns A new date which is the first day of the target month.
 */
export declare const getFirstDayOfMonth: (target: Date) => Date;
/**
 * Calculate the last day of a month.
 * @param target  Target month.
 * @returns A new date which is the last day of the target month.
 */
export declare const getLastDayOfMonth: (target: Date) => Date;
/**
 * Creates an ordered array of the week containing the target date
 *
 * @param target Target date of the week
 * @returns An array starting by sunday and finished by saturday which includes the target date
 */
export declare const createWeekArray: (target: Date) => Date[];
/**
 * Creates an array of weeks for the target month. Each week is itself an array of dates containing the week's dates.
 *
 * @param target The target month to create.
 * @returns A new array of array of dates containing all month dates.
 */
export declare const createMonthMatrix: (target: Date) => Date[][];
/**
 * Check if two dates belongs to the same day.
 *
 * @param d1 First date
 * @param d2 Second date
 * @returns Whether the dates are the same day, month and year
 */
export declare const isSameDay: (d1: Date, d2: Date) => boolean;
/**
 * Check if the day belongs to the week
 *
 * @param day A day to check
 * @param week A week
 * @returns Whether the day belongs to the week
 */
export declare const isBelongingAWeek: (day: Date, week: Week) => boolean;
/**
 * Check if the parameter is a valid date.
 */
export declare const isValidDate: (possibleDate: any) => boolean;
/**
 * Check if the parameter is a valid ReferenceMonth.
 * @param possibleReferenceMonth - The ReferenceMonth object to be validated.
 * @returns True if the ReferenceMonth is valid, false otherwise.
 */
export declare const isValidReferenceMonth: (possibleReferenceMonth: ReferenceMonth) => boolean;