Is there a way to disable the Calendar Drag and Drop feature in Month View?

Hi 

   I have designed the  Calendar page , the user who use this page should be able to edit the event and link a opportunity, and should not able to change the Start time and end Time,I was able to achieve this by FLS on the object. But the user is able to drag and drop the time so he is ultimately able to change the start time and end time which I don’t want them to do.