7-Week Online Courses: Last day to register for or add a Regular, Full-Term course for the semester. Drops after the last day to add will appear on a transcript. This is also the last day to drop a course (without withdrawing to zero credits) to receive any reduction in tuition and fees. 

This is also the last day to withdraw to Zero Credits (Regular Full-Term Session) for a 100% reduction in tuition and fees.

Here is more information on the dropping/withdrawal process: Drop a Course or Withdraw from UND | University of North Dakota