EXIF tag "ImageDate" & AppleScript

Question

Need some help with a script please! If
(the current date)
returns
date "Wednesday, February 2, 2011 3:16:25 PM"
day of (the current date)
returns
2
tell image version 1
value of EXIF tag "ImageDate"
end tell
returns
date "Friday, November 26, 2010 5:28:42 PM"
WHY DOES
tell image version 1
day of (value of EXIF tag "ImageDate")
end tell
return
error "Aperture got an error: Can’t make day of value of EXIF tag \"ImageDate\" of image version 1 into type specifier." number -1700 from day of value of EXIF tag "ImageDate" of image version 1 to specifier
I understand that if I set a imageDate to the (value of EXIF tag "ImageDate") I can extract the info, but I am trying to use a statement like
get every image version of project id projSel whose day of (value of EXIF tag "ImageDate") is 2
Thanks for the time.

Answer 1

I'm going to do this a different way...
  -- based on http://macscripter.net/viewtopic.php?pid=137055#p137055
                                                  set theDate to value of EXIF tag "ImageDate"
                                                  set theYear to year of theDate
                                                  set theMonth to month of theDate as integer as string
                                                  if length of theMonth is 1 then
                                                            set theMonth to "0" & theMonth
                                                  end if
                                                  set theDay to day of theDate as integer as string
                                                  if length of theDay is 1 then
                                                            set theDay to "0" & theDay
                                                  end if
                                                  set newDate to theDay & "/" & theMonth & "/" & theYear as string
  make new custom tag with properties {name:"My Date", value:newDate}