Accurate File Dates for Kiefer's Archives

Behold, actual data from this webserver:

{
    ...,

    "Resource Game.mkd": {
        "2949": {
            "secs": 1558418578.0,
            "text": "Tue May 21 01:02:58 2019"
        }
    },
    "Rise Up.md": {
        "9489": {
            "secs": 1524118458.0,
            "text": "Thu Apr 19 01:14:18 2018"
        }
    },
    "Rise Up.txt": {
        "9489": {
            "secs": 1524118458.0,
            "text": "Thu Apr 19 01:14:18 2018"
        }
    },
    ...
}

I have a lot of files ^(what?) and I like to know how old things are.

It's personally important to me that I keep archives, as I've been making things since I was little and have moved and duplicated stuff from machine to machine over the years.

There's two ways I do this. One is to index earliest files ages found by file name, which is what I do for my notes and articles, as those rarely change file names (and a renamed version is generally renamed for a reason, ie. it's distinct enough to warrant renaming).

For non-text file types or for larger and older archives where there are more cases where the same file has been used in multiple places with different names, I have an open source notebook I use which you can try out for yourself!