Go to the Finder and hit command-F (this is driven by Spotlight but not its main interface, so fair enough, it wasn't where I said). Depending on how you searched last, this window may look a little different, but usually there is a line for the search text, one for where to search, and then one more line with a popup menu that usually says Kind. If there is no more line, just hit the + button far to the right on the last bar visible above the result. Select Creation Date if you can see it in the menu. If you can't see it, select Other... at the end and you get a window with all possible options. Select Creation Date there. Set options for it - just anything but empty, you can set it to "created before" and tomorrow's date if you like. This will start the search. Now right-click on the header bar just below where you just selected the date, and select Creation Date in that menu to add one more option to sort by. Finally click that header to sort by creation date, and you get a list of everything in your computer by creation date.