export declare enum DayOfTheWeek {
    MONDAY = 1,
    TUESDAY = 2,
    WEDNESDAY = 3,
    THURSDAY = 4,
    FRIDAY = 5,
    SATURDAY = 6,
    SUNDAY = 7
}
export declare class CalendarDate {
    readonly year: number;
    /**
     * Month of the year starting from 1
     */
    readonly month: number;
    /**
     * Day of the month starting from 1
     */
    readonly day: number;
    /**
     * Seconds passed since the unix epoch. Always calculated with a time and timezone set to T00:00:00.00Z.
     */
    readonly unixTimestampInSeconds: number;
    /**
     * Day of the week starting from monday according to ISO 8601. Values from 1-7.
     */
    readonly weekday: number;
    /**
     * cache for Intl.DateTimeFormat instances
     * @private
     */
    private static dateTimeFormatterByTimezone;
    /**
     * Customizes the default string description for instances of `CalendarDate`.
     */
    get [Symbol.toStringTag](): string;
    /**
     * Throws an Error for invalid inputs.
     *
     * @param isoString Format: yyyy-MM-dd
     */
    constructor(isoString: string);
    /**
     * Throws an Error for invalid inputs.
     *
     * @param year Integer between 1-9999, other inputs may lead to unstable behaviour
     * @param month Integer between 1-12
     * @param day Integer between 1-31
     */
    constructor(year: number, month: number, day: number);
    static isLeapYear(year: number): boolean;
    static getMaxDayOfMonth(year: number, month: number): number;
    private static getIntlDateTimeFormatter;
    /**
     * returns a CalendarDate instance for the supplied Date, using UTC values
     */
    static fromDateUTC(date: Date): CalendarDate;
    /**
     * returns a CalendarDate instance for the supplied Date, using local time zone values
     */
    static fromDateLocal(date: Date): CalendarDate;
    /**
     * returns a CalendarDate instance for the supplied Date, using the supplied time zone string
     */
    static fromDateWithTimeZone(date: Date, timeZone: string): CalendarDate;
    /**
     * returns a CalendarDate instance for the current UTC Date
     */
    static nowUTC(): CalendarDate;
    /**
     * returns a CalendarDate instance for the current Date using the local time zone of your environment
     */
    static nowLocal(): CalendarDate;
    /**
     * returns a CalendarDate instance for the current Date using the supplied time zone string
     */
    static nowTimeZone(timeZone: string): CalendarDate;
    /**
     *
     * @param isoString pattern YYYY-MM-DD
     */
    static parse(isoString: string): CalendarDate;
    static max(...values: CalendarDate[]): CalendarDate;
    static min(...values: CalendarDate[]): CalendarDate;
    /**
     * Returns a copy of the supplied array of CalendarDates sorted ascending
     */
    static sortAscending(calendarDates: CalendarDate[]): CalendarDate[];
    /**
     * Returns a copy of the supplied array of CalendarDates sorted descending
     */
    static sortDescending(calendarDates: CalendarDate[]): CalendarDate[];
    /**
     * Returns the ISO string representation yyyy-MM-dd
     */
    toString(): string;
    /**
     * Returns a string representation formatted according to the specified format string.
     * Supports the following Tokens:
     *
     * - **yyyy**: four digit year
     * - **yy**: two digit year
     * - **y**: year without padding
     * - **MM**: month padded to 2 digits
     * - **M**: month without padding
     * - **dd**: day padded to 2 digits
     * - **d**: day without padding
     *
     */
    toFormat(pattern: string): string;
    /**
     * Returns a string representation formatted with the Intl.DateTimeFormat API.
     */
    toFormat(locales: string, options: Pick<Intl.DateTimeFormatOptions, 'year' | 'month' | 'day' | 'weekday'>): string;
    /**
     * Used by JSON stringify method.
     */
    toJSON(): string;
    toDateUTC(): Date;
    /**
     * @deprecated use toDateUTC instead. This method will be removed in the next major version.
     */
    toDate(): Date;
    toDateLocal(): Date;
    /**
     * Returns the unix timestamp in seconds.
     */
    valueOf(): number;
    equals(calendarDate: CalendarDate): boolean;
    /**
     * Checks if the month and year of this CalendarDate are the same as the month and year of the supplied CalendarDate.
     */
    isSameMonth(calendarDate: CalendarDate): boolean;
    /**
     * Checks if the year of this CalendarDate is the same as the year of the supplied CalendarDate.
     */
    isSameYear(calendarDate: CalendarDate): boolean;
    isBefore(calendarDate: CalendarDate): boolean;
    isAfter(calendarDate: CalendarDate): boolean;
    isBeforeOrEqual(calendarDate: CalendarDate): boolean;
    isAfterOrEqual(calendarDate: CalendarDate): boolean;
    /**
     * Returns a new CalendarDate with the specified amount of months added.
     *
     * @param amount
     * @param enforceEndOfMonth If set to true the addition will never cause an overflow to the next month.
     */
    addMonths(amount: number, enforceEndOfMonth?: boolean): CalendarDate;
    /**
     * Returns a new CalendarDate with the specified amount of days added.
     * Allows overflow.
     */
    addDays(amount: number): CalendarDate;
    getLastDayOfMonth(): CalendarDate;
    getFirstDayOfMonth(): CalendarDate;
    isFirstDayOfMonth(): boolean;
    isLastDayOfMonth(): boolean;
    /**
     * returns the last day (sunday) of the week of this calendar date as a new calendar date object.
     */
    getLastDayOfWeek(): CalendarDate;
    /**
     * returns the first day (monday) of the week of this calendar date as a new calendar date object.
     */
    getFirstDayOfWeek(): CalendarDate;
    /**
     * returns true if the weekday is monday(1)
     */
    isFirstDayOfWeek(): boolean;
    /**
     * returns true if the weekday is sunday(7)
     */
    isLastDayOfWeek(): boolean;
    /**
     * subtracts the input CalendarDate from this CalendarDate and returns the difference in days
     */
    getDifferenceInDays(calendarDate: CalendarDate, absolute?: boolean): number;
    /**
     * The number of the week of the year that the day is in. By definition (ISO 8601), the first week of a year contains January 4 of that year.
     * (The ISO-8601 week starts on Monday.) In other words, the first Thursday of a year is in week 1 of that year. (for timestamp values only).
     * [source: https://www.postgresql.org/docs/8.1/functions-datetime.html]
     */
    get week(): number;
    /**
     * Source: https://weeknumber.com/how-to/javascript
     */
    private static getWeekNumber;
    /**
     * The quarter of the year (1-4) based on the month of the date.
     *
     * Quarter breakdown:
     * - 1st Quarter: January to March (1-3)
     * - 2nd Quarter: April to June (4-6)
     * - 3rd Quarter: July to September (7-9)
     * - 4th Quarter: October to December (10-12)
     */
    get quarter(): number;
}