import { DayParts } from '../utils/day.js';
import { Weekday } from '../utils/weekStart.js';
export declare function getMonthNames(locale: string | undefined): string[];
/** The seven short weekday names, from `weekStart` on. */
export declare function getWeekDays(locale: string | undefined, weekStart: Weekday): string[];
/** The weekday of the 1st, as `Date#getDay()` counts: 0 is Sunday. */
export declare function getStartWeekDayOfMonth(month: number, year: number): Weekday;
/** `delta` days from a day, rolling over into the months and years around it. */
export declare function addDays(day: number, month: number, year: number, delta: number): DayParts;
/** Today in the user's time zone. */
export declare function getToday(): DayParts;
/** A `'YYYY-MM-DD'` day as the field shows it, `dd.mm.yyyy`, or `''` for anything else. */
export declare function getDateString(value: string | null | undefined): string;
/** What the field holds, `dd.mm.yyyy`, as `'YYYY-MM-DD'`; `null` while incomplete, or for a day that does not exist. */
export declare function parseDateString(text: string): string | null;
export interface DateMaskSelection {
    start: number;
    end: number;
}
export interface DateMaskState {
    value: string;
    selection: DateMaskSelection | null;
}
/**
 * Auto-corrects a partially typed `dd.mm.yyyy` mask value so a single out-of-range
 * digit doesn't force the user to backtrack:
 * - a day "tens" digit > 3 (e.g. typing `4`) becomes `04` and the caret jumps to the month
 * - a day of `3x` where x > 1 (e.g. `35`) becomes `0x`
 * - a month "tens" digit > 1 (e.g. `2`) becomes `02` and the caret jumps to the year
 * - a month `1x` where x > 2 (e.g. `13`) is clamped to `12`
 *
 * `previousValue` supplies the digits to retain for the part of the field that isn't
 * being rewritten. The returned `selection` is the adjusted caret position, or the
 * passed-in `selection` when no correction applies.
 */
export declare function correctDateMaskValue(nextValue: string, previousValue: string, selection: DateMaskSelection | null): DateMaskState;