Exported photos are given the wrong date
Photos exports photos and gives them a creation timestamp of the moment you exported the photo. This is just silly. The exif data in the inspector shows no sign of knowing when the original photo was taken. That information exists within Photos, so why it doesn't properly export the photo is beyond me. (Man I miss Aperture!!)
The same thing happens with videos, but I figured out that if you export the "unmodified original", it would retain the timestamp of when the video is taken. For photos, this isn't possible if I have edited the photo's appearance and want that exported.
iMac 27″, macOS 10.13