PHP generate schedule

    public function work() {
        $y = 2021;
        $m = 4;
        $t = date('t',strtotime($y.'-'.$m.'-1'));
        $arr = array();
        $weekarray=array(" Japan "," One "," Two "," 3、 ... and "," Four "," 5、 ... and "," 6、 ... and ");
        for ($i=1;$i<=$t;$i++) {
            $time = strtotime($y.'-'.$m.'-'.$i);
            $a['date1'] = date('Y-m-d H:i:s',$time);
            $a['date2'] = date('Y-m-d H:i:s',$time+86399);
            $a['day'] = $i;
            $a['week'] = $weekarray[date('w',$time)];
            $arr[] = $a;
        }
        dump($arr);
    }