Small command line world clock taken from Stack Overflow ( http://stackoverflow.com/questions/370075/command-line-world-clock )

cliclock.sh

#!/bin/sh
# Command-line world clock
# Taken from  http://stackoverflow.com/questions/370075/command-line-world-clock

# .worldclock.zones file looks like:
# US/Pacific
# Europe/Berlin
# Chile/Continental

: ${WORLDCLOCK_ZONES:=$HOME/.worldclock.zones}
: ${WORLDCLOCK_FORMAT:='+%Y-%m-%d %H:%M:%S %Z'}

while true
do
    clear
    while read zone
    do echo $zone '!' $(TZ=$zone date "$WORLDCLOCK_FORMAT")
    done < $WORLDCLOCK_ZONES |
    awk -F '!' '{ printf "%-20s  %s\n", $1, $2;}'
    sleep 1
done