import type { DateFormat } from "../dateMask";
/** Format a Date to display string per locale (US: MM/DD/YYYY, DE: DD.MM.YYYY, RoW: DD/MM/YYYY). */
export declare const formatDate: (date: Date, format: DateFormat) => string;
/** Parse a display string (with separators) or unmasked digits to Date. Returns null if invalid. */
export declare const parseDate: (value: string, format: DateFormat) => Date | null;
/** Month names for the calendar dropdown. Derives from format: DE → German, US/RoW → English. Add format in FORMAT_LOCALE for new locales (e.g. ES). */
export declare const getMonthNames: (format: DateFormat) => string[];
/** Years from min to max (inclusive). */
export declare const getYears: (minYear: number, maxYear: number) => number[];
/** Number of days in the given month (1–31). Month is 1–12. */
export declare const getDaysInMonth: (year: number, month: number) => number;
/** First weekday of the month (0 = Sunday, 6 = Saturday). Month is 1–12. */
export declare const getFirstDayOfMonth: (year: number, month: number) => number;
/** Weekday labels for the calendar header. DE → Monday first (German), US/RoW → Sunday first (English). Add format in FORMAT_LOCALE for new locales. */
export declare const getWeekdayLabels: (format: DateFormat) => readonly string[];
/** Placeholder chars for the date mask (day, month, year). */
export declare const getPlaceholderChars: (format: DateFormat) => {
    dayPlaceholderChar: string;
    monthPlaceholderChar: string;
    yearPlaceholderChar: string;
};
/** Default min year when mask blocks do not specify. Used for calendar year range. */
export declare const DEFAULT_MIN_YEAR = 1900;
/** Default max year when mask blocks do not specify. Used for calendar year range. */
export declare const DEFAULT_MAX_YEAR = 2100;
/** Whether two dates are the same calendar day. */
export declare const isSameDay: (a: Date, b: Date) => boolean;