Get the current time in all the timezones known to your machine

allTZ.sh

#!/bin/bash

# Error logging
e_error() {
    printf "$(tput setaf 1)x %s$(tput sgr0)\n" "$@"
}

# only do this if you know how to set it back
# set date/time to 10:00 AM PDT
# export TZ=PST8PDT
# sudo date 042510002013.00

# OpenSolaris
# /usr/share/lib/zoneinfo

# OS X and Linux
# /usr/share/zoneinfo

# default
TZ_DIR="/usr/share/zoneinfo"

if [ -n "$OSTYPE" ]; then

	if [[ "$OSTYPE" =~ ^darwin ]] || [[ "$OSTYPE" =~ ^linux ]]; then

		TZ_DIR="/usr/share/zoneinfo"

	elif [[ "$OSTYPE" =~ ^solaris ]]; then

		TZ_DIR="/usr/share/lib/zoneinfo"
	fi
fi

if [ ! -d "$TZ_DIR" ]; then
	e_error "$TZ_DIR does not exist"
	exit 1
fi

cd "$TZ_DIR"

# get all the timezones, trim off first 2 chars: "./"
# store in array for repeat use
declare -a all_tz=(`find .  | cut -c 3-`)

# get max len for output formatting
m=-1
for x in ${all_tz[@]}
do
   if [ ${#x} -gt $m ]
   then
      m=${#x}
   fi
done

for index in ${!all_tz[*]}
do
	export TZ=${all_tz[$index]} 
	xx=`date '+%d %b %I:%M %p'`
	printf "%-*s %s\n" $m "$TZ" "$xx" 
done