Hi guys, I have MonetDB database with table containing user table: CREATE TABLE user ( birth_date TIMESTAMP NOT NULL ); birth_date is saved in GMT without DST. (This is the default behavior of MonetDB). So I should change the TimeZone in my application. Here is my code: Class.forName("nl.cwi.monetdb.jdbc.MonetDriver"); Connectioncon =DriverManager.getConnection("jdbc:monetdb://localhost/online","monetdb","monetdb"); Statementst =con.createStatement(); ResultSetrs; Calendar c = Calendar.getInstance(TimeZone.getTimeZone("UTC")); rs =st.executeQuery("SELECT * FROM user"); while(rs.next()){ c.setTime(rs.getTimestamp("birth_date")); c.setTimeZone(TimeZone.getTimeZone("Asia/Tehran")); System.out.println(c.get(Calendar.YEAR)+"-"+c.get(Calendar.MONTH)+"-"+c.get(Calendar.DAY_OF_MONTH)+" "+c.get(Calendar.HOUR_OF_DAY)+":"+c.get(Calendar.MINUTE)+":"+c.get(Calendar.SECOND)); } But there is no difference between timestamps in database and timestamps after converting time zone in application. Could anyone help? Is this the wrong way to convert TimeZone? I'm using MonetDB version 11.9.5-20120516 on Debian 6 with openjdk 6. Here is the monetdbd getall /home/dbfarm: dbfarm /home/dbfarm/ status monetdbd[4187]1.6(Apr2012-SP1)is serving thisdbfarm mserver /usr/bin/mserver5 logfile /home/dbfarm//merovingian.log pidfile /home/dbfarm//merovingian.pid sockdir /tmp port 50000 exittimeout 60 forward proxy discovery yes discoveryttl 600 control yes passphrase {SHA512}ba3253876aed6bc22d4a6ff53d8406c6ad864195ed144ab5c87621b6c233b548baeae6956df346ec8c17f5ea10f35ee3cbc514797ed7ddd3145464e2a0bab413 mapisock /tmp/.s.monetdb.50000 controlsock /tmp/.s.merovingian.50000