/**
 * Locale-aware month and weekday name tables, backed by `Intl.DateTimeFormat`
 * and memoized per locale.
 *
 * Building an `Intl.DateTimeFormat` is comparatively expensive, so each locale's
 * long/short name arrays are computed once and cached. Detectors call
 * {@link getMonthNames} / {@link getWeekdayNames} freely without per-cell cost.
 *
 * @packageDocumentation
 */
/** Number of months in the Gregorian calendar. */
export declare const MONTHS_IN_YEAR = 12;
/** Number of days in a week. */
export declare const DAYS_IN_WEEK = 7;
/** A locale's long and short name variants for a cyclic name set. */
export interface NameTable {
    /** Full names in canonical (locale-default) casing, index-aligned. */
    readonly long: readonly string[];
    /** Abbreviated names in canonical casing, index-aligned. */
    readonly short: readonly string[];
    /** Case-insensitive lookup: normalized name → index (covers long + short). */
    readonly index: ReadonlyMap<string, number>;
}
/**
 * Returns the memoized month name table for a locale.
 *
 * @param locale - BCP-47 locale tag.
 * @returns The locale's month {@link NameTable} (indices `0`–`11`).
 */
export declare function getMonthNames(locale: string): NameTable;
/**
 * Returns the memoized weekday name table for a locale, indexed `0` = Sunday …
 * `6` = Saturday (matching `Date.prototype.getDay`).
 *
 * @param locale - BCP-47 locale tag.
 * @returns The locale's weekday {@link NameTable}.
 */
export declare function getWeekdayNames(locale: string): NameTable;
/** Clears the locale name caches. Exposed for tests and hot config reloads. */
export declare function clearNameCaches(): void;
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