You can verify adding of calendar events from choice activities as follows. Go to a course page and choose the option to create a choice activity. Fill required fields for choice activity. In this editing page, do check 'Restrict answering to this time period' check box under the 'Restrict answering to this time period' and choose arbitrary dates. Click 'Save and return to course' to save choice activity and return to the course page. Click 'Go to calendar...' link which lies within 'Upcoming events' block and verify the calendar shows events as according to the dates you set. Perform a course reset and change the start date by a few days. Verify that the calendar events are updated Import the choice activity into another course. Verify that the calendar events are imported.