import { type FormatOptionsWithLanguage } from './OptionsWithLanguage.js';
type DateFormatOptions = FormatOptionsWithLanguage<Intl.DateTimeFormatOptions>;
/** Constructing a formatter costs far more than using one, so they are kept and reused. */
export declare const getDateTimeFormatter: (language: string, options?: Intl.DateTimeFormatOptions) => Intl.DateTimeFormat;
export declare function extractDateTimeFormatOptions(calendarId?: string, timeZoneId?: string, explicitOptions?: DateFormatOptions, defaultOptions?: Intl.DateTimeFormatOptions): readonly [import("../LanguageCode.js").LanguageCode, {
    readonly localeMatcher?: "best fit" | "lookup" | undefined;
    readonly weekday?: "long" | "short" | "narrow" | undefined;
    readonly era?: "long" | "short" | "narrow" | undefined;
    readonly year?: "numeric" | "2-digit" | undefined;
    readonly month?: "numeric" | "2-digit" | "long" | "short" | "narrow" | undefined;
    readonly day?: "numeric" | "2-digit" | undefined;
    readonly hour?: "numeric" | "2-digit" | undefined;
    readonly minute?: "numeric" | "2-digit" | undefined;
    readonly second?: "numeric" | "2-digit" | undefined;
    readonly timeZoneName?: "short" | "long" | "shortOffset" | "longOffset" | "shortGeneric" | "longGeneric" | undefined;
    readonly formatMatcher?: "best fit" | "basic" | undefined;
    readonly hour12?: boolean | undefined;
    timeZone: string | undefined;
    calendar: string | undefined;
    readonly dayPeriod?: "narrow" | "short" | "long" | undefined;
    readonly numberingSystem?: string | undefined;
    readonly dateStyle?: "full" | "long" | "medium" | "short" | undefined;
    readonly timeStyle?: "full" | "long" | "medium" | "short" | undefined;
    readonly hourCycle?: "h11" | "h12" | "h23" | "h24" | undefined;
    readonly fractionalSecondDigits?: 1 | 2 | 3 | undefined;
}];
declare global {
    interface Date {
        readonly calendarId?: string;
        readonly timeZoneId?: string;
        format(...options: DateFormatOptions): string;
        formatToParts(...options: DateFormatOptions): Intl.DateTimeFormatPart[];
    }
}
export {};
//# sourceMappingURL=Date.format.d.ts.map