Changes OS X menu bar time format to whatever the fuck you want.

timeformat.sh

#!/bin/bash
killall -KILL SystemUIServer
killall -KILL SystemUIServer &> /dev/null
echo "Press CTRL+C when format changes."
if [ -z "$1" ]; then format="YYYY.MM.dd HH:mm:ss"; else format="$1"; fi
while true
do
	defaults write com.apple.menuextra.clock "DateFormat" "$format"
done