contato.html

<table>    
                <thead>    
                    <tr>                                
                        <th> Dia </th>                    
                        <th> Horário </th>
                    </tr>
                </thead>
                <tbody>    
                    <tr>
                        <td> Domingo </td>                
                        <td> Fechado </td>
                    </tr>
                    <tr>
                        <td> Segunda </td>
                        <td>  Fechado </td>
                    </tr>
                    <tr>
                        <td> Terça </td>
                        <td> 8h ~ 22h </td>
                    </tr>
                    <tr>
                        <td> Quarta </td>
                        <td> 8h ~ 22h </td>
                    </tr>
                    <tr>
                        <td> Quinta </td>
                        <td> 8h ~ 22h </td>
                    </tr>
                    <tr>
                        <td> Sexta </td>
                        <td> 8h ~ 22h </td>
                    </tr>
                    <tr>
                        <td> Sábado </td>
                        <td> 10h ~ 20h </td>
                    </tr>
                </tbody>
            </table>

style.css

table {
    margin-bottom: 40px;
}

td, th {
    border: 2px black solid;
    padding: 6px 14px;
}

thead {
    font-weight: bold;
    background: #777777;
}