For v1.3 Robert provided some additional code that enables editing of time in a date time field (I can't find the discussion at the moment)
Has anyone gotten this to work in 2.0? I've attempted to re-enable this functionality but it doesn't appear that 2.0 DE is recognizing my changes. There could also have been other changes from 1.3 to 2.0 that are neutering this but I want to get some feedback from others.