// sample custom css 
.blue-day {
  color: blue;
}
.red-day {
  color: red;
}

<!--default-->
<md-date-picker ng-model="date" on-change="date = $date" placeholder="Select Date"></md-date-picker>
<!--show only days on current month view-->
<md-date-picker current-month-view-dates-only="true" ng-model="date" on-change="date = $date"></md-date-picker>
<!-- with special days calss and promise handling -->
<md-date-picker loading="loading" date-class="specialDaysClass" on-render="onRenderDatePicker($month, $year)" ng-model="date" on-change="date = $date"></md-date-picker>
<!-- customizable date format -->
<md-date-picker ng-model="custom" format="EEE, MMM dd, yyyy" on-change="custom = $date"></md-date-picker>