Charms : Add timezone option in config.yaml, then set timezone !

[davidfischer-ch]

TIMEZONE='Europe/Zurich'

echo "$TIMEZONE" > /etc/timezone
mv /etc/localtime /etc/localtime.old
cp -f "/usr/share/zoneinfo/$TIMEZONE" /etc/localtime
ntpdate 0.pool.ntp.org

http://askubuntu.com/questions/184550/post-deploy-maas-cleanup http://www.hypexr.org/linux_date_time_help.php