.calendar-btn {
  max-width: 1022px;
  margin: 0 auto;
  padding: 30px 0 80px;
  text-align: center
}

.calendar-btn a {
  position: relative;
  line-height: 1.2;
  background-color: #333;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 405px;
  margin: 0 auto;
  padding: 10px;
  font-size: 18px;
  transition: opacity .4s ease;
  text-decoration: none;
}

.calendar-btn a:hover {
  opacity: .7
}