If you type
<table border="2">
<tr align="center”>
<th> Sun
<th> Mon
<th> Tue
<th> Wed
<th> Thu
<th> Fri
<th> Sat
</tr>
<tr align = "1eft">
<td col span = "3" >
<td> 1 </td>
<td> 2 </td>
<td> 3 </td>
<td> 4 </td>
</tr>
</table>
How the ouput will look like?