Goto a course with atleast two gorups Goto a course calendar ( add upcoming event block in the course) Click on manage subscription remove all subscriptions if you have any and add the following http://www.mozilla.org/projects/calendar/caldata/AustraliaHolidays.ics as "site/global event" Visit the calendar and verify all events are imported upder proper eventtype and course etc Verify in the database "mdl_event" all event are imported with proper "userid, courseid, gorupid, eventtype" If you dont remove before adding new subscription old events are over written. So please remove old subscriptions before adding new ones. Repeat step 4-6 with all event types i.e site, course, user, group