JSFiddle - React, Tailwind, and code Playground

HTML

<table id="MyTable" style = "border-collapse: collapse"  border = "1px">

  <thead>
    <tr>
    <th colspan="6" align="center"> Time Table </th>
    </tr>


    <tr>
       <th>DAY/TIME</th>
       <th>8-9</th>
       <th>9-10</th>
       <th>10-11</th>
       <th>11-12</th>
      <th rowspan = "6" id="vertical" style="verticle-align: buttom">Lunch Break</th>
     </tr>

    <tr>
      <th>Mon</th>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>

    <tr>
      <th>Tue</th>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>

    <tr>
      <th>Wed</th>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>

    <tr>
      <th>Thu</th>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>

    <tr>
      <th>Fri</th>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
    </tr>


  </thead> 

</table>

CSS

table#MyTable tr th#vertical a{
    width: 1.2em;
    white-space: nowrap;

    color: #000;
    display: block;
    /*Firefox*/
    -moz-transform: rotate(-90deg);
    /*Safari*/
    -webkit-transform: rotate(-90deg);
    /*Opera*/
    -o-transform: rotate(-90deg);
    /*IE*/
    writing-mode: tb-rl;
    filter: flipv fliph;
    border:1px black solid;
}
body {
    margin: 30px
}