Joshi, I'm going to make the assumption that your running Oracle 9i or 10g. Maybe that's a bad assumption, but you can correct me if I'm wrong. Reason that I mention this is that if your using "timestamp with local timezone" as your date data type then there is no time change as far as the database is concerned. This is because Oracle converts the local date/time to GMT, or Greenwich Mean Time or ZULU, before storing it and GMT does not change at all. Otherwise you should see absolutely no problems. Been happening to my servers twice a year for 13 years now. -----Original Message----- From: A Joshi [mailto:ajoshi977@xxxxxxxxx]=20 Sent: Thursday, February 24, 2005 3:38 PM To: oracle-l@xxxxxxxxxxxxx Subject: ** impact of time clock changes on Running Oracle DB Hi, I would like to know the impact of changing the time on my UNIX machine. how would it impact a ORACLE database running on the server. I think Oracle takes its sysdate from the UNIX. Thanks for your help.=20 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around=20 http://mail.yahoo.com=20 -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l