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!)

Tell you what. Until recently I was using a 700 MHz Pentium 3 machine with 512 MB RAM to serve a full intranet portal complete with document management and forums to dozens of people, written in PHP and using a MySQL database. It was blazingly fast, could probably have taken a much higher load, and I didn't even bother optimizing Apache or MySQL much.

Tell you what. Do it in Java. Oh wait, thought you said you wanted to make it slower and unstable. Sorry :(

>>21
Keyword: Dozens of people.
By dozens of people, you really mean 2 people checking on the site every 30mins, refreshing the same page.