vagrant@us:~$ ll /etc/ | grep timezone
-rw-r--r--  1 root root      20 May 16 06:27 timezone
-rw-r--r--  1 root root      20 May 16 06:22 timezone.2013-05-16@06:24~
-rw-r--r--  1 root root      20 May 16 06:24 timezone.2013-05-16@06:27~
vagrant@us:~$ cat /etc/timezone
America/Los_Angeles
vagrant@us:~$ cat /etc/timezone.2013-05-16@06:24~
America/Los_Angeles
vagrant@us:~$ cat /etc/timezone.2013-05-16@06:27~
America/Los_Angeles
vagrant@us:~$