private static final String NTP_SERVER = "ntp4.stratum1.ru";

    /**
     * Get atomically correct current date from stratum 1 NTP-server
     *
     * @return system time with computed delta between system time and NTP-server
     * @throws IOException
     */
    public Date getAtomicallyCorrectDate() throws IOException {
        NTPUDPClient client = new NTPUDPClient();
        TimeInfo time = client.getTime(InetAddress.getByName(NTP_SERVER));
        time.computeDetails();
        return new Date(System.currentTimeMillis() + time.getOffset());
    }