import { DateOptions, DayOfWeek, Month } from "../DateAssertion.types";
/**
 * Provides a numeric representation of a day of the week string. The number is
 * consistent with JavaScript's {@link Date}, so it's zero-based and starts
 * from Sunday = `0` to Saturday = `6`.
 *
 * @param day a day of the week string
 * @returns a number representing the day of the week
 */
export declare function dayOfWeekAsNumber(day: DayOfWeek): number;
/**
 * Provides a numeric representation of a month string. The number is consistent
 * with JavaScript's {@link Date}, so it's zero-based and starts from
 * January = `0` to December = `11`.
 *
 * @param month a month string
 * @returns a number representing the month
 */
export declare function monthOfYear(month: Month): number;
export declare function optionsToDate(options: DateOptions): Date;
export declare function dateToOptions(date: Date, sample?: DateOptions): DateOptions;