import { DateAndTime } from "../api-types/api.types";
/**
 * Converts a Date object to an ISO-8601 string (yyyy-MM-dd'T'HH:mm:ss.SSSZ).
 * @param date - The Date object to convert.
 * @returns The ISO-8601 formatted string.
 */
export declare function toISO8601(date: Date): DateAndTime;
/**
 * Converts an ISO-8601 string (yyyy-MM-dd'T'HH:mm:ss.SSSZ) to a Date object.
 * @param isoString - The ISO-8601 formatted string.
 * @returns The corresponding Date object.
 */
export declare function fromISO8601(isoString: DateAndTime): Date;
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