/* Keep unavailable dates visible and clearly distinguish them from bookable days. */
.datepicker table tr td.day.disabled,
.datepicker table tr td.day.disabled:hover,
.datetimepicker table tr td.day.disabled,
.datetimepicker table tr td.day.disabled:hover {
    color: #aaa !important;
    background: #f1f1f1 !important;
    background-image: none !important;
    text-shadow: none !important;
    box-shadow: none !important;
    cursor: not-allowed;
}