/**
 * @license EUPL-1.2+
 * Copyright Gemeente Amsterdam
 */
import type { DateRange } from './DatePicker';
/** Whether the date is before `minDate` or after `maxDate` (comparing by day). */
export declare const isOutOfBounds: (date: Date, minDate?: Date, maxDate?: Date) => boolean;
/** Whether the date falls strictly between the range’s start and end. */
export declare const isWithinRange: (date: Date, { start, end }: DateRange) => boolean;
/**
 * Computes the next range when a date is picked.
 * Starts a fresh range when there is no start yet, when the range is already complete,
 * or when the picked date precedes the current start; otherwise it completes the range.
 */
export declare const nextRange: ({ start, end }: DateRange, date: Date) => DateRange;
/** Returns a new date `amount` days from the given date. */
export declare const addDays: (date: Date, amount: number) => Date;
/** Returns the same day `amount` months away, clamped to the target month’s last day. */
export declare const addMonths: (date: Date, amount: number) => Date;
/** Returns the same day `amount` years away, clamped to the target month’s last day. */
export declare const addYears: (date: Date, amount: number) => Date;
/** Returns the Monday of the week containing the given date. */
export declare const startOfWeek: (date: Date) => Date;
/** Returns the Sunday of the week containing the given date. */
export declare const endOfWeek: (date: Date) => Date;
/**
 * The separator that joins fragments of an accessible name, matching the locale’s script.
 * Arabic locales use the Arabic comma (U+060C), keeping it consistent with the comma that
 * `Intl` already places inside the dates it formats for them.
 */
export declare const getListSeparator: (locale?: string) => string;
/**
 * Returns the date that keyboard focus should move to for a navigation key,
 * or `undefined` when the key does not move focus.
 */
export declare const getNextFocusDate: (key: string, shiftKey: boolean, date: Date) => Date | undefined;