import { ValidationOptions } from '../ValidationOptions';
import ValidatorJS from 'validator';
export declare const IS_ISO8601 = "isIso8601";
/**
 * Checks if the string is a valid ISO 8601 date.
 * If given value is not a string, then it returns false.
 * Use the option strict = true for additional checks for a valid date, e.g. invalidates dates like 2019-02-29.
 */
export declare function isISO8601(value: unknown, options?: ValidatorJS.IsISO8601Options): boolean;
/**
 * Checks if the string is a valid ISO 8601 date.
 * If given value is not a string, then it returns false.
 * Use the option strict = true for additional checks for a valid date, e.g. invalidates dates like 2019-02-29.
 */
export declare function IsISO8601(options?: ValidatorJS.IsISO8601Options, validationOptions?: ValidationOptions): PropertyDecorator;