Tina1959Hi Tina, the answer Princess_R is actually the first thing you should do. I know it seems impossible to believe that toggling a windows setting for the region might fix it. I had the same reaction as you years and years (decades) ago when it first started happening.
I've seen exactly the same as you have described in multiple different data files over the years and in most cases the regional toggle has indeed corrected it. (Again It makes no sense especially when every other program on the same system is showing the date correctly as per the system region setting)