import type { Temporal } from "../types.js";
export interface StartOfWeekOptions {
    /**
     * First day of the week.
     * For example, in ISO calendar Monday is `1`, Sunday is `7`.
     */
    firstDayOfWeek: number;
}
/**
 * Returns the start of a week for the given datetime.
 * 'start of a week' is ambiguous and locale-dependent,
 * so `firstDayOfWeek` option is required.
 * This function supports a calendar with a fixed `daysInWeek`,
 * even if the week contains more or less than 7 days.
 * But it doesn't support a calendar which lacks a fixed number of days.
 *
 * @param dt datetime object which includes date info
 * @returns Temporal object which represents the start of a week
 */
export declare function startOfWeek<DateTime extends Temporal.PlainDate | Temporal.PlainDateTime | Temporal.ZonedDateTime>(dt: DateTime, options: StartOfWeekOptions): DateTime;
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