import isDate from 'date-fns/isDate';
import addMinutes from 'date-fns/addMinutes';
import addHours from 'date-fns/addHours';
import addDays from 'date-fns/addDays';
import addWeeks from 'date-fns/addWeeks';
import addMonths from 'date-fns/addMonths';
import addYears from 'date-fns/addYears';
import subMinutes from 'date-fns/subMinutes';
import subHours from 'date-fns/subHours';
import subDays from 'date-fns/subDays';
import subWeeks from 'date-fns/subWeeks';
import subMonths from 'date-fns/subMonths';
import subYears from 'date-fns/subYears';
import getSeconds from 'date-fns/getSeconds';
import getMinutes from 'date-fns/getMinutes';
import getHours from 'date-fns/getHours';
import getDay from 'date-fns/getDay';
import getDate from 'date-fns/getDate';
import getMonth from 'date-fns/getMonth';
import getQuarter from 'date-fns/getQuarter';
import getYear from 'date-fns/getYear';
import getTime from 'date-fns/getTime';
import setMinutes from 'date-fns/setMinutes';
import setHours from 'date-fns/setHours';
import setMonth from 'date-fns/setMonth';
import setQuarter from 'date-fns/setQuarter';
import setYear from 'date-fns/setYear';
import isAfter from 'date-fns/isAfter';
import isBefore from 'date-fns/isBefore';
import { DateFormat, DateType } from '../interface';
export declare const DEFAULT_YEAR_ITEM_NUMBER = 12;
export declare const localeParse: (format: string) => string;
export declare function isNullEqual<T>(value1: T, value2: T): boolean | undefined;
export declare function newDate<DateType extends Date | string | number>(value?: DateType): Date | null;
export declare function parseDate(value: string, dateFormat: DateFormat): Date | null;
export { isDate };
export declare function isValid(date: DateType): boolean;
export declare function formatDate(date: DateType, _format: DateFormat, _locale?: string): string | null;
export declare function setTime(date: DateType, { hour, minute, second }: {
    hour?: number | undefined;
    minute?: number | undefined;
    second?: number | undefined;
}): Date;
export { setMinutes, setHours, setMonth, setQuarter, setYear };
export { getSeconds, getMinutes, getHours, getMonth, getQuarter, getYear, getDay, getDate, getTime };
export declare function getWeek(date: DateType): number;
export declare function getStartOfDay(date: DateType): Date;
export declare function getStartOfWeek(date: DateType): Date;
export declare function getStartOfMonth(date: DateType): Date;
export declare function getStartOfYear(date: DateType): Date;
export declare function getStartOfQuarter(date: DateType): Date;
export declare function getEndOfWeek(date: DateType): Date;
export { addMinutes, addDays, addWeeks, addMonths, addYears, addHours };
export { subMinutes, subHours, subDays, subWeeks, subMonths, subYears };
export { isBefore, isAfter };
export declare function isSameYear(date1: DateType | null, date2: DateType | null): boolean;
export declare function isSameMonth(date1: DateType | null, date2: DateType | null): boolean;
export declare function isSameQuarter(date1: DateType | null, date2: DateType | null): boolean;
export declare function isSameDay(date1: DateType | null, date2: DateType | null): boolean;
export declare function isEqual(date1: DateType | null, date2: DateType | null): boolean;
export declare function getFormattedWeekdayInLocale(date: DateType, formatFunc: (a: string | null) => void, locale: string): void;
export declare function getWeekdayMinInLocale(date: DateType, locale?: string): string | null;
export declare function getWeekdayShortInLocale(date: DateType, locale?: string): string | null;
export declare function getMonthInLocale(month: number, locale: string): string | null;
export declare function getMonthShortInLocale(month: number, locale: string): string | null;
export declare function getQuarterShortInLocale(quarter: number, locale: string): string | null;
export declare function getYearsPeriod(date: DateType, yearItemNumber: number): {
    startPeriod: number;
    endPeriod: number;
};
export declare function getLowerBoundTime(hour: number, minute: number, second: number, hourStep: number, minuteStep: number, secondStep: number): [number, number, number];
export declare const setYearOrMonthOfDate: (date1: DateType, date2: DateType, type?: string) => Date;