title: How to add custom forms in FullCalendar?
body: <p>I have created forms in HTML (shown image below), and I want to integrate this form in <a href="http://arshaw.com/fullcalendar/" rel="nofollow noreferrer">FullCalendar</a>. This form will show when I wanted to add new event. Can you give me some idea?  If possible, can I do this without modifying the plugin?</p>
  
  <p><img src="https://i.stack.imgur.com/nCHaK.png" alt="enter image description here"></p>