import { DateTime } from 'luxon';
export declare const asDateTimeString: <T extends Date | string | undefined | null>(x: T) => string | Exclude<T, Date>;
export declare const asDateString: (x: Date | string | null) => string | null;
export declare const extractTimeZone: (dateTimeOriginal?: string | null) => import("luxon").Zone<true> | undefined;
export declare const mergeTimeZone: (dateTimeOriginal?: string | null, timeZone?: string | null) => DateTime<true> | DateTime<false> | undefined;
