EXIF date/time tags don't show even with -a

[snowmentality]

EXIF Date Time Original and Date Time Digitized metadata appear correctly in the Metadata panel of Adobe Lightroom CC (see attached Lightroom screenshot). But when I do exiftool -a -G1 -s on the image file, those tags do not appear anywhere. The output of exiftool -a -G1 -s for the same image file from the Lightroom screenshot is in the attached text file.

System/software info: OS X 10.10.2, ExifTool 9.98, Lightroom CC 2015.1 release.

Note: I had previously changed IPTC:DateCreated to January 1, 1950. This is a scanned photo and that was its approximate date. Presumably that value propagated to the XMP-photoshop:DateCreated tag. I understand that the Composite:DateTimeCreated and Composite:DateTimeOriginal tags created by ExifTool pull data from the IPTC:DateCreated and IPTC:TimeCreated tags, so they also show 1950:01:01 19:37:41-05:00. However, as I would expect, the EXIF Date Time Original and Date Time Digitized fields in Lightroom show the date that the photo was scanned, which was May 19, 2013.

My ultimate goal is to use ExifTool to change ExifIFD:DateTimeOriginal to reflect the date that the original photograph was taken (in this case, that would be January 1, 1950) and ExifIFD:CreateDate (Date Time Digitized, in Lightroom's display) to reflect the date the photograph was scanned. (Lightroom will not let you edit these two fields independently.) But I am now confused about why ExifTool doesn't seem to see ExifIFD:DateTimeOriginal or ExifIFD:CreateDate at all.

(Another possibly-relevant fact: When I open the image file using Preview and open the Inspector to view the EXIF metadata there, it also shows January 1 as the Date/Time Created, implying that it is drawing from the IPTC:DateCreated tag rather than the EXIF Date Time Original or Date Time Digitized tags. See the attached Preview screenshot.)

[Phil Harvey]

See the EXIF tag name documentation for the ExifTool names for these tags.  You should be looking for CreateDate, not DateTimeDigitized.

I can't explain why Lightroom shows DateTimeOriginal when it doesn't exist in the EXIF.

- Phil

[snowmentality]

Sorry, I wasn't clear. Yes, I was looking for EXIF CreateDate by that name, not DateTimeDigitized.

Bummer -- I was hoping I might just have missed something and the EXIF CreateDate and DateTimeOriginal tags really were there after all; I guess if it doesn't show up with exiftool -a -G1 -s, it really just isn't there at all. But thanks for the reply! I think I'll go and dig more into Lightroom and see if I can find where it's keeping that information.