Unable to sync time using `ntpdate`, error: "no server suitable for synchronization found"

my ntp (/etc/ntp.conf) says

server 0.ubuntu.pool.ntp.org
server 1.ubuntu.pool.ntp.org
server 2.ubuntu.pool.ntp.org
server 3.ubuntu.pool.ntp.org

change yours to this and do it as root (sudo -i)

service ntp stop

do the changes:

service ntp start

test it

date

UPDATE: last night I have to configure a machine and found this that could be helpful

~# dpkg-reconfigure tzdata

You can set your time zone and exit (as root: sudo -i)

:~# dpkg-reconfigure tzdata


Current default time zone: 'America/Montevideo'
Local time is now:      Tue Mar  6 13:18:00 UYST 2012.
Universal Time is now:  Tue Mar  6 15:18:00 UTC 2012.

:~#