I see what you see when switching to United States date/time format. There does not seem to be any way to change this.
This is a user to user forum. By posting here you are not guaranteed someone from Apple will read it. If you'd like Apple to know about this bug I suggest you send them feedback.
Have you received any feedback on formatting your messages so that the datadetectors identify information correctly?
I'm especially interested in learning how to ensure location data is extracted properly. Can't seem to find any good information on formatting email messages to ensure that datadetectors can do their job in the most efficient manner possible.