html
<table>
<thead>
<th>Dia</th>
<th>Horário</th>
</thead>
<tbody>
<tb>
<td>Segunda</td>
<td>8h ~ 20h</td>
</tb>
<tr>
<td>Quarta</td>
<td>8h ~ 20h</td>
</tr>
<tr>
<td>Sexta</td>
<td>8h ~ 20h</td>
</tr>
</tbody>
</table>CSS
/* Tabela */
table{
margin: 20px 40px;
}
thead{
background: #555;
color: white;
font-weight: bold;
}
td, th{
border: 1px solid black;
padding: 8px 15px;
}