Why can't I download apps?

[Windows Central Question]

I can't download apps

I have the Lumia 822 and downloaded the 8.1 update and now my apps will not update. Gives me error code 80073cf3. There is also no calender app

 

[gpobernardo]

Re: I can't download apps

Make sure that your date and time are set correctly.

What do you mean there's no calendar app? There are both a lot of calendar apps in the Store AND the default calendar app should be seen in the app list - this cannot be uninstalled. If you can't see this default calendar app, you may need to restore your phone to factory defaults.