Accurate File Dates for Kiefer's Archives

Behold, actual data from this webserver:

{
    ...,

    "What is a Krill.txt": {
        "1353": {
            "secs": 1468449035.0,
            "text": "Wed Jul 13 17:30:35 2016"
        }
    },
    "WhoDunDead.md": {
        "13437": {
            "secs": 1596941636.7007508,
            "text": "Sat Aug  8 21:53:56 2020"
        }
    },
    "Wide World Economy.md": {
        "4630": {
            "secs": 1661835466.0,
            "text": "Mon Aug 29 23:57:46 2022"
        }
    },
    ...
}

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!