/**
 * Internal, calendar-agnostic date representations.
 *
 * By default the library uses the Gregorian calendar, but we also support
 * the Persian (Jalali) calendar via a thin adapter layer.
 */
export type OnlyDateFormat = string;
export type OnlyDateUnits = {
    date: number;
    month: number;
    year: number;
};
export type DateUnitType = 'date' | 'month' | 'year';
export type DateLocale = {
    locale: string;
};
export type CalendarType = 'gregorian' | 'persian';
export type CalendarAdapter = {
    calendar: CalendarType;
    /**
     * Convert calendar-specific date string (YYYY-MM-DD) to calendar units.
     */
    toUnits: (date: OnlyDateFormat) => OnlyDateUnits;
    /**
     * Convert calendar units to a calendar-specific date string (YYYY-MM-DD).
     */
    toOnlyDateFormat: (units: OnlyDateUnits) => OnlyDateFormat;
    /**
     * Convert calendar units to a real JS Date for comparison / clamping.
     */
    toDate: (units: OnlyDateUnits) => Date;
    /**
     * Number of days in a given month of a given year for this calendar.
     */
    getDaysInMonth: (year: number, month: number) => number;
    /**
     * Localized month names (index 0-11).
     */
    getLocalizedMonthNames: (locale: string) => string[];
    /**
     * Order of date units based on locale (e.g. ['year','month','date']).
     */
    getSortedDateUnitPositions: (locale: string) => DateUnitType[];
};
export declare const GregorianCalendarAdapter: CalendarAdapter;
export declare const PersianCalendarAdapter: CalendarAdapter;
export declare const getCalendarAdapter: (calendar: CalendarType) => CalendarAdapter;
export declare const DateUtils: {
    MONTH_COUNT: number;
    toUnits: (date: OnlyDateFormat | Date) => OnlyDateUnits;
    toDate: (units: OnlyDateUnits) => Date;
    toOnlyDateFormat: (units: OnlyDateUnits) => OnlyDateFormat;
    inRange: (units: OnlyDateUnits, start: Date, end: Date) => boolean;
    withBoundaries: (date: Date, min: Date, max: Date) => Date;
    getDaysInMonth: (year: number, month: number) => number;
    getSortedDateUnitPositions: (locale: string) => DateUnitType[];
    getLocalizedMonthNames: (locale: string) => string[];
    isFirstUnitPosition: (list: DateUnitType[], search: DateUnitType) => boolean;
    isLastUnitPosition: (list: DateUnitType[], search: DateUnitType) => boolean;
};
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