Susan Stepney, the page owner, has/had a fantastic personal library. As in, extra wings built onto her house just to hold more books. The site is a bit like an old book shop, as in you're never quite sure what you'll find on it!
This is one of those times when, while trying to be funny, using the wrong one of "affect" vs "effect" really puts a ding in the credibility of the author.
Addendum to my previous comment, you can change this behavior with the -s option to `cal`:
-s country_code
Assume the switch from Julian to Gregorian Calendar at the date
associated with the country_code. If not specified, ncal tries
to guess the switch date from the local environment or falls back
to September 2, 1752. This was when Great Britain and her
colonies switched to the Gregorian Calendar.
"24 interesting things that you learn about computers in the movies..." has become pretty outdated, but it's an interesting historical artifact.
Imagine balking at the idea that laptops could support video chat. https://www-users.cs.york.ac.uk/susan/joke/24.htm
Reminds me a lot of the Jargon File, and really just the silly humor that filled the early Internet. https://en.wikipedia.org/wiki/Jargon_File