I want to code a blog system. What language?

What coding language would I need to learn to code a blog system?
PHP? ASP? What are blog systems (like livejournal, blogger.com, etc) usually coded in?

Why I want to learn coding: to code a dynamic blogging system that supports "categories" (basically, tagging of blog entries), cause I haven't seen one anywhere..

about me: I'm an absolue newbie at coding. Did some HTML back in 1997. (And no..you won't see me post about my mood and what song I'm listening to, so please help!)

Choice of language doesn't matter. That you're asking something like this tells us that you're going to re-do the code at least a couple of times.

Try writing a HTTP server first. That's a nice thing to write in order to acquaint yourself with a new language.