.table {
    border-collapse: collapse;
    border-spacing: 0;
    font-family: sans-serif;
}

.caption,
thead {
    border: 1px solid black;
    font-weight: 600;
    border-bottom: none;
}

td {
    border: 1px solid black;
    text-align: center;
}

.holiday {
    color: red;
}