import { Granularity } from './types.js';
export type Period = {
    amount: number;
    granularity: Granularity;
};
export declare namespace Period {
    function forward(period: Period, base?: Date | number): Date;
    function backward(period: Period, base?: Date | number): Date;
    function toMs(period: Period, now?: Date): number;
    function format(p: Period): string;
}