title: Laravel carbon failed to parse time string
body: <p>I need to select users with specific age from model User, but have this error:</p>
  
  <pre><code>DateTime::__construct(): Failed to parse time string (birth) at position 0 (b): The timezone could not be found in the database 
  </code></pre>
  
  <p>part of controller:</p>
  
  <pre><code>$users = User::where(Carbon::parse('birth')-&gt;diff(Carbon::now())-&gt;format('%y'), '&gt;=', 18)-&gt;get();
  </code></pre>
  
  <p>when i use it in view all working fine:</p>
  
  <pre><code> @foreach ($userss as $user)
  
   &lt;?php  $age_year = Carbon::parse($user-&gt;birth)-&gt;diff(Carbon::now())-&gt;format('%y'); ?&gt;
  
  
  @endforeach
  </code></pre>
  
  <p>Thanks for answers!</p>