import { ISODateTimeString } from '../metadata/ISODateTimeStrings';
export declare class TimeDurations {
    static toMillis(duration: Duration): DurationMS;
    static compute(duration: Duration, date?: Date): Date;
    static format(duration: Duration): DurationStr;
    static formatConcise(duration: Duration): void;
    static toRandom(duration: Duration): DurationMS;
    static hasElapsed(since: Date | ISODateTimeString, duration: Duration, now?: Date): boolean;
    static inWeeks(since: Date | ISODateTimeString, now?: Date): string;
    private static toDate;
}
export declare type DurationMS = number;
export declare type DurationStr = string;
export declare type Duration = DurationStr | DurationMS;