import type { ContextOptions, DateArg } from "./types.js";
/**
* The {@link isSunday} function options.
*/
export interface IsSundayOptions extends ContextOptions<Date> {}
/**
* @name isSunday
* @category Weekday Helpers
* @summary Is the given date Sunday?
*
* @description
* Is the given date Sunday?
*
* @param date - The date to check
* @param options - The options object
*
* @returns The date is Sunday
*
* @example
* // Is 21 September 2014 Sunday?
* const result = isSunday(new Date(2014, 8, 21))
* //=> true
*/
export declare function isSunday(
date: DateArg<Date> & {},
options?: IsSundayOptions | undefined,
): boolean;