Laravel calendar scheduler

I'm trying to make an calendar scheduler for student teacher for their future lessons together. I'm trying to add day, time and DATE(most important). Right now I added day and time in each of their following meetings. For ex. every Monday at 08:00 and every Wednesday at 10:00. But what I cannot add is Date . Here is some of my coding.

$student = Auth::user()->student;
$teacher = Teacher::where('id',$id)->first();

 $lessons = $request->lessons_booked;
 $times = $request->times;
 $timesArrLength = count($times);
 $stuTeachArr = array();
 for($i = 1;$i<= $lessons;$i++){
   $studentTeacher = StudentTeacher::create([
        'student_id' => $student->id,
        'teacher_id' => $teacher->id,
        'subject_id' => $request->subject_id,
        'place_of_tutoring_id' => $request->place_of_tutoring_id,
        'lessons_booked' => $lessons,
        'lesson_nr' => $i,
        'time_id' => $times[($i-1) % $timesArrLength]['id'],
        'day' => $times[($i-1) % $timesArrLength]['day'],
        'date' => '2021-01-01', // add date here
        'lessons_left' => $request->lessons_booked - $i,
        'status' => 'active'
   ]);
   array_push($stuTeachArr,$studentTeacher);
 }

 return $stuTeachArr;

What I want is to add DATE for every lesson that will happen from now until they finish with their lessons(For ex. every Monday and every Wednesday as mentioned before). Any suggestion to change the way I'm doing would be welcomed.