I know you can adjust due dates when you import a course, but is it possible to adjust due dates in the same way within a course? Thanks!
There is a solution, but not native to Canvas: Adjust All Assignment Dates on One Page. That started with a feature request someone made in the Community to Adjust all assignment and quiz dates on a single page.
It's not the same as what you get when you import into Canvas, but it gives you control over each assignment so that you can incorporate things liked holidays, breaks, and other things that aren't able with the native import.
It uses Google Sheets and is free, but it doesn't handle differentiated assignments. Some people have posted about a paid solution in the comments for a slicker, better integrated solution.
There is currently a feature request open for voting that would make the process that happens when you import available after you import: Adjusting the dates after the course has been imported
Retrieving data ...