Bingo! I'm an idiot, thanks for pointing that out. I was indeed looking at output that was saying 00:00 for the times. I tested this by creating a file like the one in my original example with a...
I have directories full of files that contain dates and times in their names in the format YYYYMMDDhhmm. So like, one of the files is named 199407271609 with no file extension.