export declare const MIN_YEAR = -271820;
export declare const MAX_YEAR = 275759;
export declare const MINUTE_MSEC = 60000;
export declare const HOUR_MSEC = 3600000;
export declare const DAY_MSEC = 86400000;
export declare const DAY_SEC = 86400;
export declare const DAY_MINUTES = 1440;
export declare const UNIX_TIME_ZERO_AS_JULIAN_DAY = 2440587.5;
export declare const JD_J2000 = 2451545;
export declare const DELTA_TDT_SEC = 32.184;
export declare const DELTA_TDT_MSEC = 32184;
export declare const DELTA_TDT_DAYS: number;
export declare const DELTA_MJD = 2400000.5;
export declare const enEras: string[];
export declare const enMonths: string[];
export declare const enMonthsShort: string[];
export declare const enWeekdays: string[];
export declare const enWeekdaysShort: string[];
export declare const enWeekdaysMin: string[];
declare type Formatter = (dt: any, fmt: string, localeOverride?: string | string[]) => string;
export declare let formatter: Formatter;
export declare const setFormatter: (fmt: Formatter) => any;
declare type DeltaTUpdater = (post2019values?: number[], lastKnownLeapSecond?: YMDDate) => void;
export declare let deltaTUpdater: DeltaTUpdater;
export declare const setDeltaTUpdater: (dtu: DeltaTUpdater) => any;
/**
 * Specifies a calendar date by year, month, and day. Optionally provides day number and boolean flag indicating Julian
 * or Gregorian.
 */
export interface YMDDate {
    /** Year as signed integer (0 = 1 BCE, -1 = 2 BCE, etc.). */
    y?: number;
    year?: number;
    /** Quarter as 1-4. */
    q?: number;
    quarter?: number;
    /** Month as 1-12. */
    m?: number;
    month?: number;
    /** Day of month. */
    d?: number;
    day?: number;
    /** Day of week as 0-6 for Sunday-Saturday. */
    dow?: number;
    dayOfWeek?: number;
    /** Day of week month index, 1-5, e.g. 2 for 2nd Tuesday of the month. */
    dowmi?: number;
    dayOfWeekMonthIndex?: number;
    /** Day of year. */
    dy?: number;
    dayOfYear?: number;
    /** Day number where 1970-01-01 = 0. */
    n?: number;
    epochDay?: number;
    /** true if this is a Julian calendar date, false for Gregorian. */
    j?: boolean;
    isJulian?: boolean;
    /** ISO year for week of year. */
    yw?: number;
    yearByWeek?: number;
    /** ISO week of year. */
    w?: number;
    week?: number;
    /** ISO day or week. */
    dw?: number;
    dayByWeek?: number;
    /** Locale year for week of year. */
    ywl?: number;
    yearByWeekLocale?: number;
    /** Locale week of year. */
    wl?: number;
    weekLocale?: number;
    /** Locale day or week. */
    dwl?: number;
    dayByWeekLocale?: number;
    /** Error, if any. */
    error?: string;
}
export interface DateAndTime extends YMDDate {
    hrs?: number;
    hour?: number;
    min?: number;
    minute?: number;
    sec?: number;
    second?: number;
    millis?: number;
    utcOffset?: number;
    dstOffset?: number;
    occurrence?: number;
    deltaTai?: number;
    /** Julian days, ephemeris. */
    jde?: number;
    /** Modified Julian days, ephemeris. */
    mjde?: number;
    /** Julian days, UT. */
    jdu?: number;
    /** Modified Julian days, UT. */
    mjdu?: number;
}
export declare function syncDateAndTime<T extends YMDDate | DateAndTime>(obj: T): T;
export declare function purgeAliasFields<T extends YMDDate | DateAndTime>(obj: T, keepLongForm?: boolean): T;
export declare function minimizeFields<T extends YMDDate | DateAndTime>(obj: T): T;
export declare function orderFields<T extends YMDDate | DateAndTime>(obj: T): T;
export declare function validateDateAndTime(obj: YMDDate | DateAndTime): void;
export declare function parseISODateTime(date: string, allowLeapSecond?: boolean): DateAndTime;
export declare function parseTimeOffset(offset: string, roundToMinutes?: boolean): number;
export declare function getDatePart(format: Intl.DateTimeFormat, date: number, partName: string): string;
export declare function getDatePart(fields: Intl.DateTimeFormatPart[], partName: string): string;
export declare function getDateValue(format: Intl.DateTimeFormat, date: number, partName: string): number;
export declare function getDateValue(fields: Intl.DateTimeFormatPart[], partName: string): number;
export {};
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