export declare const DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
export declare function splitValue(value: string, dateFormat?: string): string[];
/**
 * Validates a complete date of birth. Incomplete values (where the
 * year/month/day cannot all be extracted) are considered valid here, so the
 * field can rely on its required/pattern validation for those.
 */
export declare function validateDateOfBirth(value: string, { dateFormat, errorDateOfBirth, errorDateOfBirthFuture, }: {
    dateFormat?: string;
    errorDateOfBirth: string;
    errorDateOfBirthFuture: string;
}): Error | undefined;