Modify Due Dates During Import

When you import one course into another, there is an option to modify the due dates and availability dates all at one time during the import process.

Select the Adjust events and due dates option on the Import Content form.
Select the start/end dates for the original course as well as the new start/end dates for the course you are copying content into.
1. In the Beginning Date field, enter the start date of the course you are importing. You can also click the Calendar icon to select a date. Then, in the Change to field, enter the new start date, or click the Calendar icon.
2. In the Ending Date field, enter the end date of the course you are importing, or click the Calendar icon to select a date. Then, in the Change to field, enter the new end date, or click the Calendar icon.
  
  Canvas will use the new start and end dates for the course to distribute all assignments with due dates as evenly as possible across the course dates and keep due dates on the same day of the week as the original course. If the imported course and the new course vary in course length, assignments will be assigned proportionally. Once the course is imported, you can easily confirm and adjust any assignment dates using the Calendar.
If you would like to change the assigned day of the week for events and due dates, click "+Substitution" button.