Accurate File Dates for Kiefer's Archives

Behold, actual data from this webserver:

{
    ...,

    "Underworld_Races_2.md": {
        "5837": {
            "secs": 1579467516.0,
            "text": "Sun Jan 19 14:58:36 2020"
        }
    },
    "Unique Human Traits.md": {
        "8137": {
            "secs": 1704251732.4360685,
            "text": "Tue Jan  2 21:15:32 2024"
        }
    },
    "Unit Design.txt": {
        "1720": {
            "secs": 1468441407.0,
            "text": "Wed Jul 13 15:23:27 2016"
        }
    },
    ...
}

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!