Locating Exact Time And Date Of A File

I have saved numerous files to my hard drive which I am now going back through in trying to put the proper dates that they were made (most of them are audio files; but there are definitely files from every category) and for the most part, I am able to get all of the information that I needed just by right clicking on the file, scrolling down to "Properties" and then selecting the "Details" tab. Nevertheless, for some reason, a good 25-40% of them show a completely inaccurate date. So my question is: any failsafe/foolproof way of finding the correct date in question and on top of that, knowing whether or not that date is actually legitimate; whether that be with the use of some outside program, a command prompt, or some other shortcut?