// London time changes at 1 AM the last Sunday in March and the last Sunday in October, by one hour.
TimeZone bstTimeZone = new SimpleTimeZone(0 , "UK" ,
                                          Calendar.MARCH , -1, Calendar.SUNDAY, 1 * 60* 60* 1000,
                                          Calendar.OCTOBER, -1, Calendar.SUNDAY, 1 * 60* 60* 1000,
                                          1 * 60* 60* 1000);