@Override
    public String toString() {
        return (day < 10 ? (new StringBuilder().append(0).append(day)) : day) + "-" +
               (month < 10 ? (new StringBuilder().append(0).append(month)) : month) + "-" +
               year + " " +
               (hour < 10 ? (new StringBuilder().append(0).append(hour)) : hour) + ":" +
               (minute < 10 ? (new StringBuilder().append(0).append(minute)) : minute) + ":" +
               (second < 10 ? (new StringBuilder().append(0).append(second)) : second);
    }