<table cellspacing="0" class="px-calendar">
<thead>
<tr>
  <th>&nbsp;</th>
  <th scope="col" colspan="3">Monday</th>
</tr>
</thead>
<tbody>
<tr>
  <th scope="row">15:30 - 16:30</th>
  <td>Green organic synthesis routes</td>
  <td rowspan="4">Chemical Reaction Engineering</td>
  <td class="empty">&nbsp;</td>
</tr>
<tr>
  <th scope="row">16:30 - 17:00</th>
  <td class="empty">&nbsp;</td>
  <td class="empty">&nbsp;</td>
</tr>
<tr>
  <th scope="row">17:00 - 17:30</th>
  <td rowspan="2">Environmental engineering &amp; management</td>
  <td class="empty">&nbsp;</td>
</tr>
<tr>
  <th scope="row">17:30 - 19:30</th>
  <td>Test poster cases with thermo</td>
</tr>
</tbody>
</table>