List all time zones and local times

timezone.bash

#!/bin/bash

main() {
	local -r now=$(date +%s)
	find /usr/share/zoneinfo -type d -name right -prune \
		-o -type d -name posix -prune \
		-o -type f -print | while read -r f; do
		if [[ $(head -c 4 "$f") != TZif ]]; then
			continue
		fi

		tz="${f#/usr/share/zoneinfo/}"
		printf '\033[32;1m%s\033[m\t%s\n' "$tz" "$(TZ=$tz LC_ALL=C date --date @"$now")"
	done | sort -k 2 | column -t -s $'\t'
}

main