import { Temporal } from '@js-temporal/polyfill-patched';
type CalendarYMD = {
    year: number;
    month: number;
    day: number;
};
/**
 * `@js-temporal/polyfill` 0.5.x removed the `Temporal.Calendar` class and the
 * user-defined calendar protocol entirely - calendars are now plain string
 * identifiers understood natively by the polyfill, and Nepali (a luni-solar
 * calendar not in CLDR) can no longer be registered with Temporal's engine.
 *
 * `NepaliPlainDate` is a standalone, hand-rolled replacement that wraps a
 * real ISO `Temporal.PlainDate`. It intentionally mirrors the previous
 * `NepaliCalendar` class's actual behaviour rather than "fixing" it:
 * `dateAdd`/`dateUntil`/`fields`/`mergeFields` were never overridden on the
 * old `NepaliCalendar extends Temporal.Calendar` class - they were inherited
 * from its `super('iso8601')` call. This meant `.add()`/`.subtract()` on a
 * Nepali-tagged date always did plain ISO-calendar arithmetic on the
 * underlying ISO date, then re-derived Nepali fields from the result - not
 * genuine Nepali calendar arithmetic. `add`/`subtract`/`with` below
 * reproduce that exact "ISO-then-reconvert" behaviour by delegating to
 * `isoDate`, since existing workarounds elsewhere (e.g. the day-14 clamp in
 * `useNavigation.ts` and `generate-fixed-periods-monthly.ts`) depend on it.
 *
 * This implementation is based on World-Calendars library by Keith Wood:
 * https://github.com/kbwood/world-calendars
 */
declare class NepaliPlainDate {
    readonly calendarId: "nepali";
    readonly isoDate: Temporal.PlainDate;
    private constructor();
    /** Tags an existing ISO date as Nepali (reads its ISO y/m/d, converts to Nepali fields lazily). */
    static fromIso(isoDate: Temporal.PlainDate | Temporal.PlainDateLike | string): NepaliPlainDate;
    /** Constructs from Nepali-calendar-space fields (year/month/day as displayed in Nepali). */
    static from(fields: CalendarYMD, options?: Temporal.AssignmentOptions): NepaliPlainDate;
    get year(): number;
    get eraYear(): number;
    get month(): number;
    get monthCode(): string;
    get day(): number;
    get daysInMonth(): number;
    get monthsInYear(): number;
    get dayOfWeek(): number;
    get daysInWeek(): number;
    get dayOfYear(): number;
    get era(): string | undefined;
    get daysInYear(): number;
    get inLeapYear(): boolean;
    get weekOfYear(): undefined;
    get yearOfWeek(): undefined;
    with(fields: Partial<CalendarYMD>, options?: Temporal.AssignmentOptions): NepaliPlainDate;
    add(duration: Temporal.Duration | Temporal.DurationLike | string, options?: Temporal.ArithmeticOptions): NepaliPlainDate;
    subtract(duration: Temporal.Duration | Temporal.DurationLike | string, options?: Temporal.ArithmeticOptions): NepaliPlainDate;
    equals(other: NepaliPlainDate): boolean;
    toString(options?: Temporal.ShowCalendarOption): string;
    toJSON(): string;
}
export { NepaliPlainDate };