We used to be able to leave assignment times as blank and now the end time always defaults to 11:59pm. I understand why this feature was added, however, I feel like a better feature would be for schools to choose. I would like this to be optional and have schools decide what works best.
There was never a "blank" due time it was always 11:59 it was just wasn't displayed. Because there is logic based on the due date for marking something overdue or fitting it into a marking period for grading etc. the end of day i.e. 11:59 time was always used. Those features wouldn't function. We did however revert the display back to showing nothing if the teacher didn't set it to something other than 11:59 so that it would still appear to not have a due time. This was done late summer. In that way, teachers can select their own default time(s) based on their courses or leave it "blank" and have the hidden 11:59.