Explanation. Required for extension on course work past the day grades are due (one week after end of final exams or in Spring and Summer, three weeks after the last class meeting). Requires approval by instructor and Registrar. If you don't meet the extended deadline, you get the grade you earned to that point (usually an F). See policies on extensions and I grades in the Academic Guide. Warning: your graduation date may be changed if you get an extension past it. Extensions are usually limited to cases of hardship.