Calendars using formula fields as a Start or End Date | Classic

Calendars in CalendarAnything that are built using a formula date field as either the Start Date or the End Date will become uneditable. This is due to the fact that, moving an event on the calendar interface would try to edit the formula field.

A workaround for this is to replace the formula date field with a regular date field and use a workflow rule to update the date field as required.