Laravel : How to localize dates within views with Carbon [duplicate]

Question

I'm trying to localize Carbon dates in a view in different languages with no success so far.

I retrieve dates from a Model and send them to a view:

Route::get('/tables/setup', function(){
     $now=  Date::now('Europe/Paris');

     $active_tasks = GanttTask::whereDate('start_date', '<',  $now)
        ->whereDate('end_date', '>', $now)
        ->get();

     return view('my_view', compact('active_tasks'));

   });

and can easily display them in 'my_view':

  @foreach($active_tasks as $active_task)

     {{$active_task->start_date->format('l j F Y H:i:s')}}  //Friday 26 January 2018 09:19:54

     @endforeach

But I can not manage to render them in the desired language.

I tried adding Carbon::setLocale('it'); in the route or in the view with no effect.

EDIT: slight error in my blade call {{$active_task->start_date->format('l j F Y H:i:s')}} instead of {{$active_task->format('l j F Y H:i:s')}}