import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
export interface IIsISO8601Props {
}
/**
 * Check if the string is a valid [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) date.
 */
export declare const isISO8601: (props?: TReferenceProps<IIsISO8601Props> & IStringProps) => TStringValidatorResult;