Name: avC70361 Date: 07/06/98



  SimpleTimeZone.inDaylightTime(Date) works wrong when SimpleTimeZone has DST
rules but having DST offset that is 0. It returns false for a date during DST.

Here is a test demonstrating the bug.
---------------
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.SimpleTimeZone;
import java.util.TimeZone;

public class InDaylightTimeTest {

  public static void main(String args[]) {
    SimpleTimeZone tz = new SimpleTimeZone(
      60 * 60 * 1000, "stz",
      Calendar.JANUARY, 1, 0, 0, /* DST start day: January, 1, 0:00 */
      Calendar.APRIL, 1, 0, 0, /* DST end day: April, 1, 0:00 */
      0
    );

    Calendar calendar = new GregorianCalendar(tz);

    // setting a date during DST
    calendar.clear();
    calendar.set(Calendar.ERA, GregorianCalendar.AD);
    calendar.set(Calendar.YEAR, 1998);
    calendar.set(Calendar.MONTH, Calendar.FEBRUARY);
    calendar.set(Calendar.DATE, 1);
    calendar.set(Calendar.HOUR, 0);

    Date date = calendar.getTime();

    if (!tz.inDaylightTime(date)) {
      System.out.println(
        "tz = " + tz + "\n" +
        "date = " + date + "\n" +
        "Failed. inDaylightTime(date) returns false for a date during DST"
      );
    } else {
      System.out.println("Passed");
    }
  }
}

---------The test output--------
> java InDaylightTimeTest
tz = java.util.SimpleTimeZone[id=stz,offset=3600000,dstSavings=0,useDaylight=true,startYear=0,startMode=1,startMonth=0,startDay=1,startDayOfWeek=0,startTime=0,endMode=1,endMonth=3,endDay=1,endDayOfWeek=0,endTime=0]
date = Sun Feb 01 02:00:00 GMT+03:00 1998
Failed. inDaylightTime(date) returns false for a date during DST

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