use Carbon\Carbon;

class EventController extends \BaseController {
    public function index() {
        .........
        $dt = Carbon::now();
            $dateNow = $dt->toDateTimeString();

        View::share('dateNow', $dateNow);

        albo

        return View::make('jakis widok')->with(......., 'dateNow', $dateNow);
    }
}

w widoku example.blade.php

@if($jakis_obiekt->updated_at >= $dateNow)
    jakis kod
@endif