We decided to extend the later due date of exercise 6, so you may submit it until the complimentary recitation, assuming you don't care about seeing it back before the exam. If you submit it until the 20th, you get it back in said recitation (no change here). Don't bother submitting after Jan 26.
Note: your choice of the submission date only affects the return date of the graded exercise. It still forms exactly one sixth of the HW grade.