Do you need to edit the event that you added to your class calendar. Just follow these quick steps

1. Click My Calendar icon in the bottom menu of your Home screen
2. Scroll to the Event you want to edit
3. Click on the Event
4. Click Options in the top right corner of the Event Details
5. Click Edit
6. The Event opens up in the Edit mode
7. You can edit the - Title, Location, Notes, Dates, Time, Repeat, Invitees
8. Make your changes 
9. Click Save.

Note: If the event has Invitees and needs RSVP you will see the Only Invited users will be notified dialogue. If the event has no invitees, you will see the Notify All, Do Not Notify All dialogue. Proceed accordingly to update your event.