import { BsDate, CalendarAdapter, CalendarMode, PickerLocale, ValueFormat } from '../types.js';
export declare function formatDateValue(date: Date, adapter: CalendarAdapter, options?: {
    mode?: CalendarMode;
    format?: string;
    locale?: PickerLocale;
}): string;
export declare function parseDateValue(value: Date | string | number | null | undefined): Date | null;
export declare function formatRange(start: Date, end: Date, adapter: CalendarAdapter, options?: {
    mode?: CalendarMode;
    format?: string;
    separator?: string;
    locale?: PickerLocale;
}): string;
/** Resolve the machine ("server") value for one date, independent of the
 *  display calendar/format. Defaults to AD ISO. Built from local `ad`
 *  components (no `toISOString()` → no timezone shift). */
export declare function formatMachineValue(parts: {
    ad: Date;
    bs: BsDate;
    time?: {
        hour: number;
        minute: number;
        second?: number;
    };
}, format: ValueFormat, adapter: CalendarAdapter, withTime?: boolean): string | number | Date;
/** Coerce a machine value into a string for a DOM/form field (Date → AD ISO). */
export declare function stringifyMachineValue(value: string | number | Date): string;