declare type IntlDateTimeFormatOptions = {
    localeMatcher: 'lookup' | 'best fit';
    timeZone: string;
    hour12: boolean;
    hourCycle: 'h11' | 'h12' | 'h23' | 'h24';
    formatMatcher: 'basic' | 'best fit';
    weekday: 'long' | 'short' | 'narrow';
    era: 'long' | 'short' | 'narrow';
    year: 'numeric' | '2-digit';
    month: 'numeric' | '2-digit' | 'long' | 'short' | 'narrow';
    day: 'numeric' | '2-digit';
    hour: 'numeric' | '2-digit';
    minute: 'numeric' | '2-digit';
    second: 'numeric' | '2-digit';
    timeZoneName: 'long' | 'short';
};
declare type WeekFuncArgProps = {
    weekStartsOn: number;
    modifyInPlace: boolean;
};
declare type LocaleArgs = {
    locale: string;
    localeFormat: Partial<IntlDateTimeFormatOptions>;
};
export declare function columnNamesForThisISOWeek(optionalArgs?: Partial<WeekFuncArgProps> & Partial<LocaleArgs>): string[];
export declare function columnNamesForThisWeek(optionalArgs?: Partial<WeekFuncArgProps> & Partial<LocaleArgs>): string[];
export declare function format(date: Date, locale: string, localeFormat?: Partial<IntlDateTimeFormatOptions>): string;
export declare function rangeThisISOWeek(): Date[];
export declare function rangeThisWeek(optionalArgs?: Partial<WeekFuncArgProps>): Date[];
/**
 * calculates the range of dates based on the provided date and weekStartsOn 0-6 index value
 * @returns an array of Date instances
 */
export declare function rangeForDateWeek(d: Date, optionalArgs?: Partial<WeekFuncArgProps>): Date[];
/**
 * @returns an array of dates from the start to the end
 */
export declare function dateRange(start: Date, end: Date): Date[];
/**
 * get a new Date with the provided milliseconds added
 * @param date
 * @param milliseconds
 * @returns new Date instance with the milliseconds added
 */
export declare function addMilliseconds(date: Date, milliseconds: number): Date;
/**
 * @returns an integer value inclusive of any partial days (e.g. if exact difference is 1.5, returns 2)
 */
export declare function differenceInDays(d1: Date, d2: Date, useAbsolute?: boolean): number;
export declare function endOfWeek(d: Date, optionalArgs?: Partial<WeekFuncArgProps>): Date;
/**
 * sets the date instance value to the start of the week
 * @returns the same Date instance (mutates the passed Date instance)
 */
export declare function startOfWeek(d: Date, optionalArgs?: Partial<WeekFuncArgProps>): Date;
/**
 * sets the date instance to the start of its day
 * @returns the same Date instance (mutates the passed Date instance)
 */
export declare function startOfDay(d: Date): Date;
/**
 * sets the date instance to the end of its day
 * @returns the same Date instance (mutates the passed Date instance)
 */
export declare function endOfDay(d: Date): Date;
/**
 * determines the number of days in the month of the provided date instance
 * @param date
 */
export declare function daysInMonth(date: Date): number;
/**
 * 1st date of the month for the month of the provided date
 * @param date
 * @param modifyInPlace - default false
 * @returns new Date instance or existing if modifyInPlace
 */
export declare function startOfMonth(date: Date, modifyInPlace?: boolean): Date;
export declare function isFirstOfMonth(date: Date): boolean;
export declare function isLastDateOfMonth(date: Date): boolean;
/**
 * calculates the startOf the previous calendar month
 * @param date
 * @param modifyInPlace
 */
export declare function previousMonth(date: Date, modifyInPlace?: boolean): Date;
/**
 * calculates the startOf the next calendar month
 * @param date
 * @param modifyInPlace
 */
export declare function nextMonth(date: Date, modifyInPlace?: boolean): Date;
/**
 * adds or subtracts (if negative) the designated number of months from the date
 * @param date
 * @param numMonths
 * @param modifyInPlace
 */
export declare function addMonths(date: Date, numMonths: number, modifyInPlace?: boolean): Date;
/**
 * last date of the month for the month of the provided date
 * @param date
 * @param modifyInPlace - default false
 * @returns new Date instance or existing if modifyInPlace
 */
export declare function endOfMonth(date: Date, modifyInPlace?: boolean): Date;
/**
 * gets an array of all the dates for the month of the provided date
 * @param date
 */
export declare function dateRangeForMonth(date: Date): Date[];
/**
 * determines whether the year of the provided date meets the criteria of a leap year
 * @param date - javascript Date object
 */
export declare function isLeapYear(date: Date): boolean;
export declare function isEqual(d1: Date, d2: Date): boolean;
export declare function isBefore(d1: Date, d2: Date): boolean;
export declare function isAfter(d1: Date, d2: Date): boolean;
export declare function isSameYear(d1: Date, d2: Date): boolean;
export declare function isSameMonth(d1: Date, d2: Date): boolean;
export declare function isSameDate(d1: Date, d2: Date): boolean;
export declare function isToday(date: Date): boolean;
export {};