Carbon unexpected date-time format in Laravel

I have problem with Carbon and HTML5 input input[type=datetime-local] because this input sends datatime in format Y-m-d\TH:i (eg. 2016-11-20T11:45).

I have method in my controller:

public function store(ModelStoreFormRequest $request) 
{
    $model = new Model($request->all());
    $model->save();
    return redirect->action(/*...*/);
}

And I get exception:

InvalidArgumentException in Carbon.php line 582: Data Missing
1. in Carbon.php line 582
2. at Carbon::createFromFormat('Y-m-d H:i:s', '2016-11-20T11:45') in HasAttributes.php line 709

So I have solved this problem by creating next function in my model:

public function setStartedAtAttribute($startedAt)
{
    if( $startedAt instanceof Carbon ) {
        $this->attributes['started_at'] = $startedAt;
        return;
    }

    if( strpos($startedAt, 'T' ) ) {
        $this->attributes['started_at'] = Carbon::createFromFormat('Y-m-d\TH:i', $startedAt);
        return;
    }

    $this->attributes['started_at'] = Carbon::createFromFormat('Y-m-d H:i:s', $startedAt);
}

But I do not like this solution, I wonder if there are more elegant solution? I am thinking to use ModelStoreFormRequest::prepareForValidation() method and there to check if format of date is: Y-m-d\TH:i to change datetime value to format: Y-m-d H:i:s, or maybe to use Carbon::parse() method like this:

protected function prepareForValidation() 
{
    $input = $this->all();
    $input['started_at'] = \Carbon\Carbon::parse($input['started_at']);
    $this->replace($input);
}

But I still do not know is this solution fine. I am trying to separate concerns and obligation of each class... What do you suggest? Any other more elegant solution or stick to the current one?

via Chebli Mohamed