select.buunto-date-picker-dropdown.buunto-dropdown {
  border: none;
  font-weight: bold;
  font-size: 18px;
  background-color: #3fa435;
  text-align: center;
  color: #fff;
  -webkit-appearance: none;
  -moz-appearance: none;
  text-indent: 1px;
  overflow: hidden;
  text-overflow: initial;
}

select.buunto-time-slot-picker-dropdown option:disabled {
  display: none;
}