Formatting the date in unix to include suffix on day (st, nd, rd and th)

Question

How can I add the suffix on the day number of a unix date?

I\'ll explain. I have a TextMate bundle snippit that writes out today\'s date. It uses unix date and

Answer 1

#!/bin/ksh
DateSuffix() {
if [ "$1" -eq "1" ] || [ "$1" -eq "21" ] || [ "$1" -eq "31" ]
then
echo 'st'
elif [ "$1" -eq "2" ] || [ "$1" -eq "22" ]
then
echo 'nd'
elif [ "$1" -eq "3" ] [ "$1" -eq "23" ]
then
echo 'rd'
else
echo 'th'
fi   
}
date "+%A %d`DateSuffix` %B %Y"