Look all the way down at the Calendar on the second link there as there is also a calendar on the first link way down.
They say "Learn by example"
I have just done a little of that.
I was looking for a way to make and put up a calendar on a simple web site that I have and I found the code for what might be a master-mold-layout code set up for a nice monthly calendar, I also found another code example for doing about the same thing, I have no time right now for real study of the code, but that is really not needed for making a calendar, moving the code some is easy enough for the making of the calendar and no need to know how the code works, it did take a while to get the code and to find out how to manipulate it so as to make any monthly calendar with it.
I almost never look at HTML code, very very seldom, but I might be using that Web site and I am trying to make it a little better, even somebody who knows no html code can do it, it just takes longer.