JSFiddle - React, Tailwind, and code Playground

HTML

<table border="0">       
<tr><td>Time</td><td class="weekr1">Monday</td><td class="weekr1">tuesday</td><td class="weekr1">Wednesday</td><td class="weekr1">Thursday</td><td class="weekr1">Friday</td><td class="weekr1">Saturday</td><td class="weekr1">Sunday</td></tr>   
<tr><td class="timer1">9-11</td>  <td><input type="checkbox" name="checkbox" class="r1"/>select </td><td><input type="checkbox" name="checkbox" class="r1"/>select </td><td><input type="checkbox" name="checkbox" class="r1"/>select </td><td><input type="checkbox" name="checkbox" class="r1"/>select </td><td><input type="checkbox" name="checkbox" class="r1"/>select </td><td><input type="checkbox" name="checkbox" class="r1"/>select </td><td><input  name="checkbox" type="checkbox"  class="r1" />select</td></tr>  
<tr><th class="timer2">11-1</th>  <td><input type="checkbox"  class="r2"/>select </td><td><input type="checkbox"  class="r2" />select</td><td><input type="checkbox"  class="r2"/>select </td><td><input type="checkbox"  class="r2"/>select </td><td><input type="checkbox"  class="r2"/>select </td><td><input type="checkbox"  class="r2"/>select </td><td><input type="checkbox"  class="r2"/>select </td></tr>
<tr><th class="timer3">1-2</th>  <td><input type="checkbox"  class="r3"/>select </td><td><input type="checkbox"  class="r3"/>select </td><td><input type="checkbox"  class="r3"/>select </td><td><input type="checkbox"  class="r3"/>select </td><td><input type="checkbox"  class="r3"/>select </td><td><input type="checkbox"  class="r3"/>select </td><td><input type="checkbox"  class="r3" />select</td></tr>
<tr><th class="timer4">2-3</th>  <td><input type="checkbox"  class="r4"/>select </td><td><input type="checkbox"  class="r4"/>select </td><td><input type="checkbox"  class="r4"/>select </td><td><input type="checkbox"  class="r4"/>select </td><td><input type="checkbox"  class="r4"/>select </td><td><input type="checkbox"  class="r4"/>select </td><td><input type="checkbox"  class="r4" />select</td></tr>
   ...

JavaScript

$(function(){
    $('input:not(#submit)').click(function()
  { 
   t= $(this).attr('class'); 
    
        
    text= $('.time'+t).text(); 
     //alert(text);      

   
        
  });
  
  // For getting the Day
   $('td').click(function()
  {  
    index = this.cellIndex;   
     
     
   days = $('tr:first').find('td').eq(index).text(); 

 // alert(days);
 });  

 // for saving data into the database
   $('#submit').click(function() {
					 alert(text);
                 alert(days);
				
			   
            /*     $.ajax({
                    type: "POST",
                    cache: false,       
                    url: 'save.php',
                    data: {'time='+time, 'day='+day},
                    success: function(data) {
                        alert('data has been stored to database');
                    }
					}); */
					});
 
});