This is my lock screen mod inspired by the iPhone typophone lock screen.

Attached is the perl script that creates the lock screen mod and puts the image in the right theme folder. You will need to have ImageMagick command line tools installed and modify the perl script a bit to match your needs (background image to use, theme paths etc) but I'm sure you clever ones will figure it out Also you need to remove the 'switch to unlock' text and the lock slider graphics. It uses Helvetica Neue fonts so you will have to track them down as well if you want the exact same style.

Use Alarmed app to automatically run the script daily at midnight to get the right date shown.

Change the extension of the attached lockScreenCal.txt to .pl.

Make the perl script executable ('chmod a+x lockScreenCal.pl') or execute it with 'perl lockScreenCal.pl'.

lockScreenCal.txt