Organize scanned pictures without a certain date

Question

I already read a similar thread, which I couldn't post in, as it was archived.
Since iPhoto is designed for digital pictures, we all assume to create and manage our libraries by using digitally taken pictures. I am somehow enough "young" to have the majority of my personal photos in a native digital format, however I lived a life even before…say 2001, when I've got my first digital camera. As most of us, I still have many printed pictures that are waiting to be scanned and digitally stored. Though, the digital version of that pictures will be stored with the file creation date, which is obviously not only a later one, but something unnecessary, as I guess noone will be able to trace the exact shot instant.
Given that the photo file must have an exact date, I guess if iPhoto might be able to ignore those infos and lets the user set a vague date like "summer 1988" or maybe a range of days like "July 19th to August 3rd". In other words, in my opinion, iPhoto should be able to contain less infos in the library.
A similar problem exists with the shot location: my iPhone records all pictures location, while my previous digital camera wasn't able to do it. Again: I had to manually set them for all pictures and since I wasn't able to trace the exact location (say a certain street) I created a location with a big area around (it can be set in iPhoto) and called eg "Paris".
The main concept is that we'd need a way (if it doesn't already exist) to have an idea of the metadata that wasn't recorded within the file.

Answer 1

Larry, I know that iPhoto must have a specific date: I was questioning about the uselessness of a specific date when it is unretrievable. If someone agrees with me, the more users report this problem, the less time it will take to Apple to consider in its plans.
By the way I knew already how to change the date and time of a picture (I find it a great feauture!). As for the places circle thing, I used it as an example of what in my opinion should be done with time, as it was already conceived for space. In other words you don't have to set a specific point on the planet for each picture, but rather you may set a range of specific places. Similarly, I believe that this range might be adopted for those pictures that we don't remember exactly when they were taken, but we rather remember the range of time during which they were taken.
I hope I've been more clear than in my prevoius post.