import { CalendarDate } from './calendar';
import { TimePeriod } from './interval';
import { YearMonthDay } from './math';
/**
 * Add years, days, hours, etc, to dates. This function always returns
 * the result in UTC.
 *
 * Compatible with the Temporal API (except for rounding; we only truncate)
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/add
 */
export declare const add: (orig: CalendarDate, added: Partial<TimePeriod>) => [number, number];
/**
 * Add the date parts of a TimePeriod to a date.
 */
export declare const dateAdd: (date: YearMonthDay, added: Pick<TimePeriod, "year" | "month" | "week" | "day">) => YearMonthDay;
export declare const millisToTimePeriod: (millis: number) => TimePeriod;