When I used to have windows, the creation date of a file downloaded from the internet was the date the copy of that file was made on the hard drive. In OSX, the creation date shown is the unix creation date, I guess. The problem is with downloaded files, and not only, I guess you have a very large folder with downloaded files too. Sometimes I forget the name of the downloaded file, sometimes the browsers cleans up automatically the history, sometimes when I unarchieve a downloaded rar file, the extracted file will have a different name. Very annoying sometimes to find the new downloaded file when I cant sort the files by download date, and the creation date does not help. How do you deal with that ?