How to display Telerik RadDatePicker Calendar PopUp Above

For this issue,you have to do two simple steps.These simple two steps are  as follows:--

Step-1:
   First use this JavaScript in your HTML code
JavaScript :

Step-2:
After that you have to use this below code in your .cs file(Page_Load event)

RadDatePicker1.DatePopupButton.Attributes.Add("onclick","PopupAbove(event, '" +  RadDatePicker1.ClientID + "');return false;");

Note:-

If you are till facing problem,i mean to say that Calendar popup not showing on top then let me know.Comment please