import { MessageFunctionType, Result } from '../types';
export interface IsRFC3339Errors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_RFC3339_ERRORS: IsRFC3339Errors;
/**
 * Check if `target` is a valid RFC3339 timestamp
 *
 * ### Example
 * ```
 * expect(isRFC3339('2009-05-19 14:39:22-06:00').value).toBeTruthy()
 * ```
 * @param target The time stamp
 *
 * @example
```
const isRFC3339:boolean = isRFC3339('2002-10-02T15:00:00Z')
```
 */
export declare function isRFC3339(target: string): Result<boolean | undefined>;