Videos I shoot using an

CodePudding user response：

Working with feedback provided by StarGeek in a comment to my question, I reformatted the SD card that came with the pen camera, then created the two folders and one text file (PHOTO, VIDEO, time.txt) the pen camera would normally auto-create upon inserting the SD card into the camera. That seemed to resolve the issue with the various file date fields showing incorrect dates.

In one of my comments above I also complained that the fix seemed to disable the photo function; it turns out that I had just not understood the camera's instructions clearly (the user must invoke the video mode first, then use the function button to take photos).

I'm not going to mark this answer as the accepted one for now; I want to test the pen camera out for a few days to ensure that the fix described above actually continues to work.