import { type AnyDuration } from '@date-vir/duration';
import { type FullDate } from '../full-date/full-date-shape.js';
import { type Timezone } from '../timezone/timezones.js';
/**
 * Calculates a new date starting at the given fullDate and adding the given offsets. Offsets can be
 * negative to go backwards in time.
 *
 * @category Calculation
 * @example
 *
 * ```ts
 * import {calculateRelativeDate} from 'date-vir';
 *
 * calculateRelativeDate(getNowInUserTimezone(), {days: 2});
 * ```
 */
export declare function calculateRelativeDate<const SpecificTimezone extends Timezone>(fullDate: Readonly<FullDate<SpecificTimezone>>, offset: Readonly<AnyDuration>): FullDate<SpecificTimezone>;