What makes NSCalendarsUsageDescription required?
<p>When I upload to iTunes Connect, my app gets the error that the <code>NSCalendarsUsageDescription</code> privacy is not provided. I am aware that this information is now mandatory, however I am not aware what and where my app uses something that would require this privacy usage description.</p>

<p>What is my app doing/using that it requires a <code>NSCalendarsUsageDescription</code>?</p>

<pre><code>Dear developer,

We have discovered one or more issues with your recent delivery for "MyApp". To process your delivery, the following issues must be corrected:

This app attempts to access privacy-sensitive data without a usage description. The app's Info.plist must contain an NSCalendarsUsageDescription key with a string value explaining to the user how the app uses this data.

Once these issues have been corrected, you can then redeliver the corrected binary.

Regards,

The App Store team
</code></pre>

<p>Edit: Not a duplicate because of the fact that the solution didn't work as I already commented on the first answer AND the fact that the possible duplicate doesn't actually answer the question what (generally) makes this usage description required.</p>