title: Laravel Carbon set locale doesn't apply
body: <p>I have a problem to return date in french in my laravel project, </p>
  
  <p>in my model I have the following method : </p>
  
  <pre><code>public function getShowDateAttribute()
  {
      Carbon::setLocale('fr_FR');
      return Carbon::parse($this-&gt;conference_date)-&gt;format('D d F Y');
  }
  </code></pre>
  
  <p>But the date is still in english, </p>
  
  <p>I've tried also</p>
  
  <pre><code>setLocale(LC_TIME,'fr_FR'); 
  </code></pre>
  
  <p>But the date is still in english.
  I've also tried to use the php date function and the localizedFormat method of Carbon but always same result : date in english,</p>
  
  <p>would you have any idea of the problem ?
  ( I checked with locale -a and fr_FR is available on my computer )</p>
  
  <p>Thank you </p>