Hello.
You should remember that the assignment submission date is basically an internal decision of any college or university it is not for public,it is only for those students who are doing this course from the same university or college, so I will suggest you to check official website of University on regular basis there will be a notification update which will give you an accurate date.
Best of luck.

IGNOU

Admissions Courses & Fees Placements Reviews

Shortlist

Brochure