import { Temporal } from 'temporal-polyfill';
type DtDateTimeOptions = {
    /** If provided, the resulting instance is converted into this zone. */
    timezone?: string;
};
/**
 * Dynatrace JS-DateTime utility class.
 * Works with ISO 8601 / RFC 3339 date-time strings with/without timezones.
 * Timezone defaults to user's preferred timezone, or UTC if not available.
 * @internal
 */
export declare class DtDateTime {
    private dateTime;
    constructor(dateTimeString: string, options?: DtDateTimeOptions);
    /**
     * Normalize common RFC3339 variants:
     *  - lowercase 't' → 'T'
     *  - lowercase 'z' → 'Z'
     *  - space between date/time or underscore for Grail support → 'T'
     *
     * We only normalize the first separator between date and time (YYYY-MM-DD <sep> HH:mm…)
     * to avoid mangling valid strings that contain spaces elsewhere (e.g. annotations).
     * See: https://ijmacd.github.io/rfc3339-iso8601/ and https://www.rfc-editor.org/rfc/rfc3339.html#section-5.6
     */
    private static normalizeRfc3339;
    addDuration(duration: Temporal.DurationLike): DtDateTime;
    addDays(days: number): DtDateTime;
    addWeeks(weeks: number): DtDateTime;
    toString(): string;
    private static fromZdt;
}
export {};