Confused about Date

Hello,

I'm a bit confused about Date. In the example below, I get the present
Date, format it to Strings using DateFormaters, reparse the String using
the _same_ DateFormater and recombine them by adding.

The ouput is not the same as the input. Why?

In my locale it outputs:
Before: 23.10.07 19:16:49
After: 23.10.07 18:16:49

Thanks Phil

-- SSCCE --

import java.text.DateFormat;
import java.text.ParseException;
import java.util.Date;

public class TimeTest {
   public static void main(String[] args) {
     DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT);
     DateFormat tf = DateFormat.getTimeInstance(DateFormat.MEDIUM);
     DateFormat dtf =
DateFormat.getDateTimeInstance(DateFormat.SHORT,DateFormat.MEDIUM);

     // getting actual time
     Date now = new Date();

     System.out.println("Before: "+ dtf.format(now));

     // separating in date and time strings
     String dateString = df.format(now);
     String timeString = tf.format(now);

     Date date = null;
     Date time = null;
     try {
       // parsing date and time strings
       date = df.parse(dateString);
       time = tf.parse(timeString);
     } catch (ParseException e) {
       e.printStackTrace();
     }

     // recombining date and time
     Date after = new Date(date.getTime() + time.getTime());

     System.out.println("After: "+ dtf.format(after));
   }

}