Events exported via the Data Center Security United Management Console (DCS UMC) in .xls format show a different Time Stamp than the Real Time within the UMC Console.
It’s By Design, UTC vs CST.DCS stores the Reports in UTC Time Frame, the PC the DCS UMC Console is running on is what's translating it.
Windows
To synchronize time set the PC running the DCS UMC console to UTC then both the Time Stamps will match.
Otherwise, manipulate the data (Add or Subtract the time as per the Real-Time Events Time Stamp) to get it to a different Timezone (example: Excel has this feature).