How do I Save event (date chabges) after drop and resize

Hi  I am trying to use this component. I have created my form and it shows all my events beautifully.  
The drag and drop  and resize works just as I want it to on the calendar form, but I must still add the code to save the new dates to my events.  I am very new to web development.  Can someone please help me. 
Kind regards Sophia