Is there a way to disable the default calendar app on a Samsung Galaxy S4? I'd like to use the standard Google Calendar app (as available in the Play Store) too keep track of events.  However, Samsung includes a modified version of the calendar on the S4.  In previous iterations of the Galaxy it was possible to disable the Samsung version of the Calendar app so that I wouldn't get duplicate notifications of events.  On the S4, it does not seem possible to disable the app or it's notifications (the "disable" button and "show notifications" checkbox are greyed-out in the app info screen).  Is there some other trick I can use to disable the Samsung Calendar app?
Assuming your end goal is just to get the app to shut up (i.e. not get double calendar notifications for all events), all you have to do is disable the alerts and notifications from within the app itself.


Go into the App 
Press the menu button 
Choose Settings 
Scroll to the bottom 
Change Set alerts &amp; notifications to off


For good measure, I also unchecked Vibration and set Select ringtone to Silent, but that probably wasn't necessary.

The app will still be on your phone, but aside from the icon being there you won't even notice it unless you open it.