1) Aha, ok, but when I go through the preferences dialog, it is not possible (see picture). I could not turn it off, but it turns out that it has no bearing on the main issue.
2) Because in calendar view the completed task name bar *with* a completed time ends somewhere "in the middle" of the completed day. This is not pretty. It is also distracting to me.
I don't need to count the time (even if I did that, I might use the time tracker?). So, I really don't know why the completed time is indicated in the calendar view. Thx for asking.