The documentation for EKEvent.occurrenceDate mentions under Special Considerations, "This property is not available on iOS." However under the list of SDKs on the right side of that page it includes iOS 9.0+.
I can confirm that the property is available for events fetched by my app running on iOS 11.0. Can anyone confirm that this special consideration note is just left over from iOS 4.0-8.x and that there are no longer any special caveats for using it on iOS?