import { LocaleData } from '../../types';
/**
 * Parses a date string according to a specified format string and locale.
 * @param dateString The string representation of the date.
 * @param formatString The format to parse against (e.g., 'DD/MM/YYYY').
 * @param locale The locale data containing month and day names.
 * @returns A valid Date object, or an invalid Date if parsing fails.
 */
export declare function parseDate(dateString: string, formatString: string, locale: LocaleData): Date;