I've read your posts, but can't tell what you want. The snippet of code I posted was to extract the date for you so you can do something with it. Presumably, you want to display it womewhereYou didn't say what you want to do with it. It certainly doesn't require "manual rewriting all of the Calibre functions for the entire HTML fetching & rendering operations."
As for bolding the title, you can use extra_css.
As for "views and number of comments/posts along with pipe symbol," I think you're asking how to remove that "junk", and the answer is you use remove_tags.
The speed limit on our spacetime highway of life is c - lightspeed. Surprisingly, the posted minimum is also c. We can go no faster, nor any slower! The conversion factor from the time dimension to space is ct. When stationary in space, we must move into the future at c to have our clock tick off t. When moving in space, the spacetime vector c tilts from pure motion in time. The faster we move in the space dimension, the slower we move in the time dimension.