First, make sure the incorrect date in the calendar is pointing to that specific Turnitin
Assignment and not a completely separate Turnitin Assignment. If it is not connected
to a separate Turnitin Assignment, next go into the settings of the Turnitin Assignment
to verify the dates there are correct there. Don't forget to check if there is a "expect
completed on" date enabled in the section Activity Completion as that can sometimes
create a calendar item.
If you have verified it isn't another Turnitin Assignment and that the dates in the
settings are all correct, then it might be that the incorrect date in the calendar
is a phantom date held over from when the Turnitin Assignment was imported into the
course. We do not recommend importing Turnitin Assignments as they can remain connected
to the original Turnitin Assignment. Sometimes this manifests as phantom dates on
the calendar, and sometimes it results in Originality Reports not being processed.
To avoid this, we recommend creating Turnitin Assignments from scratch each term.
To remove the phantom calendar dates, you can delete the Turnitin Assignment and then
Restore it from the Recycle Bin. To delete, from your course homepage click the three
dots underneath the Turnitin Assignment and select Delete. Wait about an hour. Then,
from your course homepage, click the gear icon in the upper right to open the Course
Administration and select Recycle Bin (near the bottom). Find the Turnitin Assignment
you deleted and click the Restore icon. The Turnitin Assignment will then be restored,
along with the correct dates in the calendar.