Java Date from millis - long vs int

For the following code:

import java.text.SimpleDateFormat;
import java.util.Date;

public class TestMain {

    public static void main(String[] args) {
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
        System.out.println(sdf.format(new Date(1386633600000L)));
        System.out.println(sdf.format(new Date(1386633600 * 1000)));
    }

}

I get the following outputs:

10-12-2013
24-12-1969

Why do they differ?