Have not found a way (yet) to sort or filter my Lightening Calendar Events by an assigned "category ID". I've also not been able to find an extension or add-on that may address such a capability. For example: I have a series of medical appointments scheduled throughout an upcoming year or any time-frame. I would like to be able to sort or filter on the category ID that I've created for those appointments. It is likely possible that I've overlooked an obvious option or even add-on, but so far No Joy. Creating a "Task" is a possibility, but Tasks will not appear in the Lightening Calendar display. Any suggestions please?