import type { DayOfWeek } from '../constants';
declare type Options = {
    /** Use the UTC timezone */
    UTC?: boolean;
    /** Which day of the week is considered the beginning */
    firstDayOfWeek?: DayOfWeek;
};
/**
 * Determine the start of the week for a date
 *
 * @param input The date
 * @param __namedParameters see {@link Options}
 * @default UTC false
 * @default firstDayOfWeek Sunday
 * @returns The date value for midnight on the first day of the specified week
 */
export declare function getBeginningOfWeek(input: Date, { UTC, firstDayOfWeek }?: Options): Date;
export default getBeginningOfWeek;