/**
 * Converts a local date string to a UTC date string on a 1-to-1 basis.
 * @param dateString - The local date string to be converted to a UTC date string.
 * @returns - The UTC date string in ISO format.
 *
 * @example
 * const localDateString = '2021-01-01 00:00:00.000';
 * const utcDateString = convertLocalStringToUTCString(localDateString);
 * console.log(utcDateString); // '2021-01-01T00:00:00.000Z'
 */
export declare const convertLocalStringToUTCString: (dateString: string) => string;
/**
 * Converts a UTC date string to a local date string on a 1-to-1 basis.
 * @param dateString - The UTC date string to be converted to a local date string.
 * @returns - The local date string without the 'T' and 'Z' characters.
 *
 * @example
 * const utcDateString = '2021-01-01T00:00:00.000Z';
 * const localDateString = convertUTCStringToLocalString(utcDateString);
 * console.log(localDateString); // '2021-01-01 00:00:00.000'
 */
export declare const convertUTCStringToLocalString: (dateString: string) => string;