Replying to Helen's comments on MDL-19226 -
Yes, I suppose it does just apply to those assignments(or other modules) where late submissions are an option. However, there is another scenario where an offline assignment may have a deadline specified and manual entry by the tutor is the only way of knowing when it was done. It might be necessary to manually set the time submitted then, as the grading of the work may happen after the deadline.
The time difference is of interest as it is still something that is worth commenting on in a report if the student is consistently getting thigs done days early, or just in the nick of time.
In order to make this feature really useful, there are the wider issues of being able to set deadlines with late submission for more (all?) modules e.g. quizzes, and also about being able to set different deadlines for different groups, which is vital in order for this feature to be useful in a school environment. With these issues also addressed, the gradebook would be pretty much perfect IMHO.
There is no room for lateness tracking in current gradebook db tables, sorry
maybe in 2.0