import moment from "moment-timezone";
export declare class TimeService {
    private static instance;
    private timeZone;
    private constructor();
    static getInstance(): TimeService;
    setTimeZone(timeZone: string): void;
    toUTC(datetime: Date | string, format: string): string;
    toLocalServerTime(datetime: Date | string | null | undefined, format: string): string;
    getServerTimeZone(): string;
}
export declare const getMomentTz: () => typeof moment;
export declare const dxtServerTimeZone: () => () => string;
export declare const dxtToUTC: (datetime: Date | string, format: string) => string;
export declare const dxtToLocalServerTime: (datetime: Date | string | null | undefined, format: string) => string;