import type { DateTime, DateTimeOptionsWhenParsing } from '../typings';
export declare function isLikeRelative(text: unknown): text is string;
/**
 * Parses a number, text or `Date` to a `DateTime` value. If a timeZone is supplied the incoming value
 * is parsed with that timeZone as a base.
 *
 * It can also parse the relative date and time format, e.g. `'now-6h'` will be parsed as `Date.now() - 6 hours` and
 * returned as a valid `DateTime` value.
 */
export declare function dateTimeParse(input: unknown, options?: DateTimeOptionsWhenParsing): DateTime | undefined;
/**
 * Checks if value is a valid date which in this context means that it is either
 * a `DateTime` instance or it can be parsed by parse function.
 */
export declare function isValid(value?: string | DateTime): boolean;