import { Zone } from "../zone.js";
import { ZoneOffsetFormat, ZoneOffsetOptions } from "../types/zone.js";
/**
 * Represents the local zone for this JavaScript environment.
 * @implements {Zone}
 */
export declare class SystemZone extends Zone {
    /**
     * Get a singleton instance of the local zone
     * @return {SystemZone}
     */
    static get instance(): SystemZone;
    /** @override **/
    get isUniversal(): boolean;
    /** @override **/
    get isValid(): boolean;
    /** @override **/
    get name(): string;
    /** @override **/
    get type(): "system";
    /** @override **/
    equals(otherZone: Zone): boolean;
    /** @override **/
    formatOffset(ts: number, format: ZoneOffsetFormat): string;
    /** @override **/
    offset(ts: number): number;
    /** @override **/
    offsetName(ts: number, { format, locale }: ZoneOffsetOptions): string;
}