I'm confused. If your phone isn't jailbroken... then I'm assuming that is not your phone in the image. Are you trying to ask how to achieve that lockscreen in your image?
If that is your question, then I can tell you that with a single CSS file, you can make my SlantedLock look like that. Except the days are full words. Replace the full words with 3 letter abbreviated in the js file and you get the identical look.