Calendar to browse events block doesn't fit into column.

This block has a set width and doesn't fit  into my theme's column, or maybe its because its aligning to the left.
   how do I change it? Specifically 
How  do I change the Element style properties for the sticky-header?

<table class="sticky-header" style="position: fixed; top: 0px; width: 184.033px; left: 971px; visibility: hidden;">
<thead>
<tr>
<th class="sun" style="width: 24.2px;">Dom</th>
<th class="mon" style="width: 19.8px;">Lun</th>
<th class="tue" style="width: 22px;">Mar</th>
<th class="wed" style="width: 17.6px;">Mié</th>
<th class="thu" style="width: 15.4px;">Jue</th>
<th class="fri" style="width: 15.4px;">Vie</th>
<th class="sat" style="width: 17.6px;">Sáb</th>
</tr>
</thead>
</table>

Thanks,