This is not system time, it is part of your kernel version (time to create your OS kernel). There is nothing to worry about (except, perhaps check that this is an updated kernel, if you do not control the computer, do not worry about it).
If you can run system commands, you can get this by running uname -a. Output on my box:
Linux xyzzy 3.0.0-13-server
, - ( " ?" ).
: http://en.wikipedia.org/wiki/Uname