If you have noticed your date format is incorrect when exporting from system reporter to CSV here is how to fix it. Once you have generated your report you need to look in your web browser you are running your reports from for the part of the URL that says timeform=Auto, I have highlighted the relevant text in an example URL below.
Simply change where it says Auto to Full so it should look like this timeform=full. Press enter in your browser to rerun your report and then you should find when you export to CSV the date format shows correctly.
Rather than trying to find the relevant parts to change in your web browsers address bar you may find it easier to copy the full URL to notepad, edit it here and then copy back to the address bar.