Bootstrap notes

You can link only the required Bootstrap CSS & JS files, all are not required. I am using only bootstrap.css and boostrap.js. Check the documentation for what has what.

How2 header and footer??

https://www.freecodecamp.org/news/reusable-html-components-how-to-reuse-a-header-and-footer-on-a-website/

Ephemera

Why worry about the Y10K problem if it is going to happen many centuries after your death? Exactly because you will already be dead, so the companies using your software will be stuck using your software without any other coder who knows the system well enough to come in and fix it.

(Source: MDN Docs on HTML date & time formats)

Putting down content first and then thinking about design: A different and interesting paradigm for me. :)

I think beyond a certain level of eccentricity, the immediate juxtaposition of serif/sans fonts is going to be a very dated design trend.