declare class DateHelper {
    getDateFromString(dateString: string): Date | null;
    normalizeDateString(dateString: string): string | null;
    private normalizeDDMMYYYY;
    private normalizeYYYYMMDD;
    private normalizeYYYYMMDDNoSeparator;
    isValidDate(dateString: string | null): boolean;
}
export { DateHelper };