public function store(IlluminateHttpRequest $request)
{
$this->validate($request, [
'time_start' => 'date_format:H:i',
'time_end' => 'date_format:H:i|after:time_start',
]);
// do other stuff
}
$this->validate($request, ['my_date' => 'date_format:Y-m-dTH:i']);
'day' => 'required|date',