body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f8;
}
.container {
  max-width: 800px;
  margin: auto;
  padding: 15px;
}
h1 {
  text-align: center;
  color: #0a3d62;
}
.month {
  background: #fff;
  margin-bottom: 15px;
  padding: 15px;
  border-radius: 10px;
}
.month h2 {
  margin: 0 0 10px;
  color: #1e3799;
}
.holiday {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}
.holiday:last-child {
  border-bottom: none;
}