/**
 * Date validation core module
 * Provides the base validation functionality for Date instances
 */
import { type StandardSchemaV1 } from "../../Validate/standardSchema";
import type { ValidateCoreReturnType } from "../../Validate/type";
/**
 * Creates a Date validator. The validator checks both that the value is an
 * instance of Date and that it represents a valid moment in time (i.e. its
 * underlying timestamp is not NaN), so values created from invalid inputs
 * such as `new Date("not-a-date")` are rejected.
 * @param {string} [message] - Custom error message for type validation
 * @returns {Function} - Validator function that checks if the value is a Date instance
 */
export declare const date: (message?: string) => ((value: Date) => ValidateCoreReturnType<Date>) & StandardSchemaV1<Date, Date>;