I saw your note in the post apologizing for making up your own terminology. I wouldn't feel too bad. In the SQL world no two authors I've read use the same terminology for these things! :-) Perhaps some terms are more "standard" than others, but they are all far from universal.
The least ambiguous terminology for me has been Martin Fowler's: `occurred_on`, `noticed_on` and additionally `recorded_on`. That way you keep track of when an event occured, when the accountants realized it and when the system recorded it. Sometimes these matter, esp. when dealing with distributed state.
