Initial setup: Create a course. Create a user and enrol to that course. Create Group1 and Group2 in that course. We should create a new course and a new user to make sure there are no existing events.   Testing 1: Go to Course -> Calendar -> Manage subscriptions. Verify that you will see: No calendar subscriptions yet. Do you want to Import an external calendar? Verify that you will see the Import calendar page when clicking on Import an external calendar? hyperlink. Verify that there are two new buttons called: Import calendar and Export calendar on the top right. Verify that you will see the Import calendar page when clicking on the Import calendar button. Verify that you will see the Export calendar page when clicking on the Export calendar button. Testing 2: Go to Course -> Calendar -> Manage subscriptions -> Import Calendar. Fill in the below information: Calendar name: Vietnam's holiday. Calendar URL: https://www.officeholidays.com/ics/vietnam Type of event: User. Press Import calendar. Verify that it should save the calendar and redirect back to the manage calendar subscription page. Verify that you will see 2 hyperlinks called Update and Remove in the Action column. Verify that the Update and Remove function work as expected. Verify that the updated/removed information will be display in the alert box (See alert.png attachment) Testing 3: Verify all event types Repeat the steps from 1-6 in the Testing 2, and change the Type of event in the 2nd step to Course/Category/Site/Group.