These docs are for an old release.
Info on upgrading to v4
eventDataTransform
Transforms custom data into a standard Event Object.
function( eventData ) {}
This hook allows you to receive arbitrary event data from a JSON feed or any other Event Source and transform it into the type of data FullCalendar accepts. This let’s you easily accept alternative data formats without having to write a completely custom events function.
This function is called once per received event. eventData is the event data that has been receieved. The function must return a new object in the Event Object format.