Hi there-where in settings did you go? Did you to settings/general/international/region?
There you can chose the format and it gives you a sample of what it will look like. If you have already tried that-i apologize.
If you haven't tried any of the other immediate fixes try these:
Force the app to quit by pushing the home button twice to bring up your multi-task bar. This will show all the apps that you have visited. By long pressing the app in question, it will begin to jiggle-press the red circle with the negative sign on the app. It will only quit the app and not delete. Than try to re-open the app and test out.
If that doesn't work, restart the iPad by pressing the power switch down to power off.
Let us know if that helps.