Below is a fix for those who upgraded to iOS 6 and haven’t been able to get the passbook app to connect to the itunes app store. Luckly there is a easy but strange fix.
First go to Settings > Date & Time
Turn off “Set Automatically”
Go to “Set Date & Time”
Change the month to January
Open the passbook app and click the app store button. The apps should load now.
Then go back to Date & Time and turn back on the “Set Automatically” button.
Go back to passbook and everything should still be working. Now if only it was a more useful app right now but I’m sure it will get there. Baby steps to the future.
Tried it several times, but still not working !!
Try changing the year to 2013. Let me know if that works for you.