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srmcatee,
XOOPS shouldn't require any patches. XOOPS uses PHP to retrieve the time from the server it is hosted on, then adjusts the time offset based on your configuration in the Administrator Control Panel.
As long as the Administrator(s) of the server you are hosted on are using NTP to keep the server time accurate, you shouldn't have an issue.
HTH.
JM
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.