There was a reason for the change. This was done all over the Server and Scripts. If you change it one place, you will probably need to change it in many other places also. See this thread for the notification of change:
if u want change all DateTime.UtcNow with DateTime.UtcNow, open all your script and server file with Notepad++ and replace the string DateTime.UtcNow with DateTime.Now. Recompile and Restart and all Look Better
change the code DateTime.UtcNow to DateTime.Now on script ...ServUO\Scripts\Misc\Timestamp.cs The code is 2 times in the system ...ServUO\Scripts\Misc\Timestamp.cs and on ...ServUO\Scripts\Commands\TimeStamp.cs