Anyway my suggestion is to use UTC all over the place as the reference clock setting.

As soon as you have multiple locations and/or need to work with people in different timezones it pays of.

for i in `vzlist | awk ‘{print $1} | grep -v CTID’`
do
vzctl exec $i rm -f /etc/localtime 2>/dev/null
vzctl exec $i ln -s /usr/share/zoneinfo/America/Phoenix /etc/localtime
done

Because /vz/private may hold disabled/suspended/shutdown containers or even random directories.