Visit the link noted above. See the calendar. See the calendar events.
Now advance to the next month using the arrow buttons near the top left.
Now go back to the current month. Observe that the calendar events have disappeared. This is not expected behaviour.
Now change the view so that you are in week or day mode.
Now return to the month mode and observe that the events have re-appeared on the current month.
Objective: Fix this calendar so that it retains its current functionality but does not lose the events when the months are paged through.
More information: This is Drupal v. 7.26. (latest)
And you can find the Drupal FullCalendar module here: https://drupal.org/project/fullcalendar
And here is a bug report that I think deals with this issue, at least they seem to be related. My post is near the bottom of this thread. I've turned off AJAX so I don't think that's the problem.
Here is an answer on StackOverflow on (maybe) how to fix it. I don't know how to run the eventsRender method after fullCalendar instantiates in Drupal.
Here is another one (maybe): https://stackoverflow.com/questions/20195156/when-switching-months-i-want-to-stop-fullcalendar-from-removing-events