ldc-gen-game-web/app/Models/Settings.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Settings extends Model
{
    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'start_date' => 'datetime',
        'end_date' => 'datetime',
    ];
}