http://unix.stackexchange.com – When executing the date command (on CentOS), it gives me something like this: Thu May 10 20:15:07 XST 2012 My local time zone is CEST, which was at that moment 22:15:07, so the printed time seems to be GMT. But even with some time in Google and the man pages I was not able to see what XST means...I guess it's quite simple, so who can help? Edit: When setting the timezone again, the output comes like that: Fri May 11 10:02:33 XDT 2012 So, the printed time is fine - I am just curious about the meaning of XST and XDT in the output. (HowTos)