ng-dynaform/src/app/dynaform/components/custom/datetime/datetime.component.html

<label>{{ label }}</label>
<clr-date-container>
	<input clrDate [ngModel]="date" (ngModelChange)="updateValue('date', $event)">
</clr-date-container>
<select clrSelect [ngModel]="hh" (ngModelChange)="updateValue('hours', $event)">
	<option *ngFor="let i of hourOptions" [value]="i">{{ i }}</option>
</select>
<select clrSelect [ngModel]="mm" (ngModelChange)="updateValue('minutes', $event)">
	<option *ngFor="let i of minuteOptions" [value]="i">{{ i }}</option>
</select>