import { DateString, LocaleType } from '../types';
export declare function addDays(date: Date, days: number): Date;
export declare function getDayFromDateString(date: DateString): number;
export declare function getNumberOfDaysInMonth(month: number, year: number): 31 | 29 | 28 | 30;
export declare function getMonthNames(locale: LocaleType): string[];
export declare function getWeekdayNames(locale: LocaleType): string[];
export declare function getDayNames(locale: LocaleType, firstDayMonday: boolean): string[];