Changing multiple due dates can be a daunting process, but by using dates report, it can make the process much more efficient by putting all your due dates on one page!
Accessing Date Reports
Step 1: In your course in Moodle, navigate to the administration block, and click Reports. This will show you the drop-down menu. Select Dates from this drop-down.
Changing Due Dates
Step 1: Choose the type of activity you want to change the due date of from the drop-down menu located under Activity type. This will list all activities of that type. If you want to see every activity in your course, ignore this drop-down and proceed to step 2.
Step 2: Click the down arrow next to the course section you wish to change due dates in or click Expand all to view all course content of that type of activity.
Step 3: Check Enable for each desired category (Open the quiz, Close the quiz, or Expect completed on) and use the calendar pop-up icon or the drop-down menus to adjust the dates.
Step 4: Scroll to the bottom of the page and click Save changes.