import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
export interface IIsRFC3339Props {
}
/**
 * Check if the string is a valid [RFC 3339](https://tools.ietf.org/html/rfc3339) date.
 */
export declare const isRFC3339: (props?: TReferenceProps<IIsRFC3339Props> & IStringProps) => TStringValidatorResult;