/**
 * Formats a Date object to ServiceNow UTC datetime format (YYYY-MM-DD HH:MM:SS)
 * @param date - The Date object to format (defaults to current time)
 * @returns Formatted UTC datetime string
 *
 * @example
 * const formatted = formatToUTC(new Date());
 * // Returns: '1970-01-01 09:45:00'
 *
 * @example
 * const formatted = formatToUTC();
 * // Returns current time in UTC: '2026-02-27 07:43:00'
 */
export declare function formatToUTC(date?: Date): string;
/**
 * Converts a datetime string from a specified timezone to UTC.
 * Similar to timeFieldToXML but handles full date and time, not just time of day.
 *
 * @param dateTimeStr - DateTime string in format 'YYYY-MM-DD HH:MM:SS'
 * @param timeZone - Optional IANA timezone string (e.g., 'America/New_York', 'Asia/Kolkata'). Defaults to system timezone.
 * @returns Formatted UTC datetime string in 'YYYY-MM-DD HH:MM:SS' format
 *
 * @example
 * // Convert '2026-03-02 14:30:00' from IST to UTC
 * const utcDate = dateTimeFieldToXML('2026-03-02 14:30:00', 'Asia/Kolkata')
 * // Returns '2026-03-02 09:00:00'
 */
export declare function dateTimeFieldToXML(dateTimeStr: string, timeZone?: string): string;
/**
 * Converts an XML datetime string (in UTC) to a datetime string in a specified timezone
 * @param utcDateTimeStr - UTC datetime string in format 'YYYY-MM-DD HH:MM:SS'
 * @param timeZone - Optional IANA timezone string (e.g., 'America/New_York', 'Asia/Kolkata'). If not provided, returns the UTC string as-is.
 * @returns Datetime string in the specified timezone in 'YYYY-MM-DD HH:MM:SS' format
 *
 * @example
 * // Convert '2026-03-02 09:00:00' UTC to IST
 * const localDateTime = convertXMLToDateTime('2026-03-02 09:00:00', 'Asia/Kolkata')
 * // Returns '2026-03-02 14:30:00'
 *
 * @example
 * // Without timezone, returns the UTC string as-is
 * const utcDateTime = convertXMLToDateTime('2026-03-02 09:00:00')
 * // Returns '2026-03-02 09:00:00'
 */
export declare function convertXMLToDateTime(utcDateTimeStr: string, timeZone?: string): string;
/**
 * Formats time data (hours, minutes, seconds) as a datetime string without timezone conversion.
 * Used for storing the original user-entered time value in the 'entered_time' field.
 *
 * @param timeData - Object containing hours, minutes, and seconds
 * @returns Formatted datetime string in 'YYYY-MM-DD HH:MM:SS' format with epoch date (1970-01-01)
 *
 * @example
 * formatTimeDataToDateTime({ hours: 14, minutes: 30, seconds: 0 })
 * // Returns '1970-01-01 14:30:00'
 */
export declare function formatTimeDataToDateTime(timeData: {
    hours?: number;
    minutes?: number;
    seconds?: number;
}): string;