andreas@corrino:~$ TZ=UTC date
fre 11 dec 2015 14:43:08 UTC
andreas@corrino:~$ TZ=Europe/Stockholm date
fre 11 dec 2015 15:43:15 CET
andreas@corrino:~$ TZ=Europe/Helsinki date
fre 11 dec 2015 16:43:19 EET
andreas@corrino:~$