table {
  font-family: sans-serif;
  margin: 20px;
  border-collapse: collapse;
}
caption {
  border: 1px solid black;
  border-bottom: 0;
  padding: 20px 50px;
  font-size: 16px;
  font-weight: bold;
  white-space: nowrap;
}
tbody tr {
  border: 1px solid black;
}
.month {
  margin: 0px;
}
th,
td {
  border: 1px solid black;
  padding: 4px 6px;
  text-align: center;
  font-size: 14px;
}
th {
  font-weight: bold;
  padding: 5px 0;
}
.weekend,
.first-day {
  color: red;
}

.last-day {
  border: 1px solid black;
}

.last-week {
  border: 1px solid black;
}

.void {
  border-left: 0;
  border-right: 0;
}