The files show zero data, but that may not be the case, try to enable the extension view so you can see what exactly they were saved as. If it’s not a Jpg/png is most likely a tag that the camera or card uses for sort for storage or batch command as the times are all exactly the same, and I’m assuming it’s showing capture time, not time loaded or edited or opened on the computer.
Either the card may be corrupt or has a writing issue, as well.
I’ve seen something similar to this, not out of a trail camera but they matched to other photos taken and it was a sort tag issue. Do they have actual photos on the card that match some of the days and times?
Is that all that was on the card or are there any actual photos saved?
Edit, I just looked at the dates as well, I’m almost certain it’s a corruption issue, most likely with the card itself.