As it is, if a post, comment, or message was made more than a single day ago, it is noted as having been done "Last [X]day" as opposed to simply "[X]day"-- which is what it ought to be while the day in question still resides within the same week as the present day.

I propose/request this dating mechanic be amended for clearer timekeeping. "Last" should be reserved for when an action is now a week old. Then things can switch to numerical dates, perhaps, when things are two weeks old and more.