In EXIF, you have DateTimeDigitized [0]
For ambiguous dates there is the EDTF Spec[1] which would be nice to see more widely adopted.
[0] https://www.media.mit.edu/pia/Research/deepview/exif.html
For ambiguous dates there is the EDTF Spec[1] which would be nice to see more widely adopted.
[0] https://www.media.mit.edu/pia/Research/deepview/exif.html
Different software reacts in different ways to partial specifications of yyyy/mm/dd such that you can try some of the cute tricks but probably only one s.w. package honours it.
And the majors ignore almost all fields other than a core set of one or two, disagree about their semantics, and also do wierd stuff with file name and atime/mtime.