Re:Saturday (Score 1)

Please excuse the accuracy of this post, I don't actually have all of the core codenames remebered, or the versioning thats part of the joke: who on earth can?

I can !!

I would think you are looking for something more like this:

Sunday - Pentium 4
Monday - Celeron
Tuesday - Pentium D
Wednesday - Centrino
Thursday - Core Duo
Friday - Pentium 4 Extreme Edition
Saturday - Core 2 Duo

The Core Duo is not a Pentium, as the Core series is supposed to replace the Pentium line. Pentium D was a replacement for the Celeron, but not part of the Pentium 4 line.