minha resposta

html:

 <table>
        <thead>
          <tr>
            <th>Dia</th>
            <th>Horário</th>
          </tr>
        <thead>
        <tbody>
          <tr>
            <td>Segunda</td>
            <td>08h ~ 20h</td>
          </tr>
          <tr>
            <td>Quarta</td>
            <td>08h ~ 20h</td>
          </tr>
          <tr>
            <td>Sexta</td>
            <td>08h ~ 20h</td>
          </tr>

        </tbody>
        <tfoot>
          <tr>
            <td colspan="2">Esperamos por você</td> 
        </tr>
        </tfoot>

      </table>

css:

thead {
  background: #555555;
  color: #ffffff;
  font-weight: bold;
}

td,
th {
  border: 1px solid #000000;
  padding: 5px 20px;
}

tfoot {
  text-align: center;
  background: #555555;
  color: #ffffff;
}