Change time for database server

Hi!
I need to change the operation system time from my database server. Is it necessary to stop database to do that or can do with the database on-line?
Thanks,
Augusto

You might want to be sure you aren't conflicting with Oracle jobs, remember in some versions of Oracle there can be more than one way of submitting jobs (not to mention OS and app specific things). In general there is no problem, but those specifics get you every time.

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