In reply to HeMa:
Ah I should have added for clarification that after importing dngs to LR I can then see the date, but not before (and during import), when stored on hdd prior to importing, I can't view it with windows (file explorer, photo viewer, etc) which is where the problem of sorting into folders for import, general browsing/deleting/etc is a pain. Oddly, after dng conversion, windows shows date of creation as the date the conversion took place and not the date of shot.
I did read online that you need to download some software to update windows' ability to read exif file properties (something to do with win 10 only as earlier versions are ok), but as I am hoping this is a short lived problem I am not going to bother. I really hope LR 7 is coming soon
.
Of course, if I just used one sd card per shoot then it would be much easier, so it's my bad practice of being lasy and filling sd cards with more than one shoot.