I’ve just updated this so if you have a Basic account, the date, start time and end time fields appear directly on the set list edit page instead of an event link. Editing these fields creates an event in the background, so if you ever upgrade to a Pro account, the full Schedule functionality will work correctly.
This is available in the web interface now, and will be available in the iOS app version I submitted to Apple today and the Android app version I plan to submit on Sunday.