set all dates from earliest date in any tag

[golek]

I have some png that get from this command:
exiftool -time:all -G1 -a -s

Result:

Code Select Expand

[System]        FileModifyDate                  : 2023:07:09 08:19:13-07:00
[System]        FileAccessDate                  : 2023:07:09 08:19:15-07:00
[System]        FileInodeChangeDate            : 2023:07:09 08:19:13-07:00
[XMP-photoshop] DateCreated                    : 2017:03:31 22:47:25
[XMP-xmp]      MetadataDate                    : 2017:04:12 13:56:18+03:00
[XMP-xmpMM]    HistoryWhen                    : 2017:04:12 13:56:18+03:00
[PNG]          CreationTime                    : 2023:07:06 17:39:17-07:00
I want to set all dates to the earliest available date (here the xmp-photoshop DateCreated).
And set also file creation and modification date to that.
I don't want to change filename.

[greybeard]

This might be helpful

https://exiftool.org/forum/index.php?topic=7986.0

[golek]

I'll investigate the set all to oldest known date code.

As a simple command:
exiftool '-AllDates<$DateCreated'
was good for using the one I know is earliest, in this case
[XMP-photoshop] DateCreated

The time tags changes are not complete. I'll have to change the system File date and PNG CreationTime

Code Select Expand

[System]        FileModifyDate                  : 2023:07:09 08:19:13-07:00
[System]        FileAccessDate                  : 2023:07:09 08:19:15-07:00
[System]        FileInodeChangeDate            : 2023:07:09 08:19:13-07:00
[XMP-photoshop] DateCreated                    : 2017:03:31 22:47:25
[XMP-xmp]      MetadataDate                    : 2017:04:12 13:56:18+03:00
[XMP-xmpMM]    HistoryWhen                    : 2017:04:12 13:56:18+03:00
[PNG]          CreationTime                    : 2023:07:06 17:39:17-07:00
to

Code Select Expand

[System]        FileModifyDate                  : 2023:07:09 09:11:54-07:00
[System]        FileAccessDate                  : 2023:07:09 09:19:05-07:00
[System]        FileInodeChangeDate            : 2023:07:09 09:11:54-07:00
[XMP-photoshop] DateCreated                    : 2017:03:31 22:47:25
[XMP-xmp]      MetadataDate                    : 2017:04:12 13:56:18+03:00
[XMP-xmpMM]    HistoryWhen                    : 2017:04:12 13:56:18+03:00
[IFD0]          ModifyDate                      : 2017:03:31 22:47:25
[ExifIFD]      DateTimeOriginal                : 2017:03:31 22:47:25
[ExifIFD]      CreateDate                      : 2017:03:31 22:47:25
[PNG]          CreationTime                    : 2023:07:06 17:39:17-07:00
[PNG]          CreateDate                      : 2017:03:31 22:47:25
[PNG]          ModifyDate                      : 2017:03:31 22:47:25

[StarGeek]

You'll have to modify and use the config file in the link provided by greybeard.  The list of tags under the Desire can be edited/expanded to include all the tags you want to check for the earliest data.  Unless you are on a Mac, you can remove the MDItem* tags.  You just have to make sure the number list doesn't skip anything.

Save the code into a file in the same directory as exiftool.  Then the very first option in your command has to be -config ConfigFileName, replacing "ConfigFileName" with the actual name you of the file you saved.

You can then copy the OldestDateTime just like it was any other tag.