table {
  margin: 50px;
  border-collapse: collapse;
  font-size: 30px;
}

caption {
  border: 1px solid black;
  border-bottom: 0;
  font-weight: bold;
  font-size: 40px;
}

tr,
th,
td {
  border: 1px solid black;
}

td,
th {
  padding: 10px;
  text-align: center;
}

th:nth-child(6),
th:nth-child(7),
td:nth-child(6),
td:nth-child(7),
.today {
  color: red;
}