Problem: The current date picker will automatically assume the time is the same time as when you are authoring the test. So if you are authoring at 4:59:03 PM, that will be the available date but also the due date and retract date. Worse, it closes as soon as you pick a day--either you have know to pick the time first (and it asks you to use military time) before the date, or you have to edit the time in the field later.
Solution: New jQuery date picker will default to 12 am and will not close after until you click done. This date picker is being used in Announcements for 10 so will have familiarity. This is being done locally at Stanford under CW-3840.