Are You Sirius?

I was recently listening to Sirius Radio and discovered they have a separate channel each for music of the 40s, 50s, 60s, 70s, 80s and 90s. At least that's what they say. If you look closer, you see the rules can be bent. After all, a decade isn't years, it's a state of mind.

For instance, "Blue Moon" by the Marcels was a huge hit in 1961, but it's really about the 50s, which is why it's played on the 50s channel.



For that matter, the first song I heard on the 4os channel was Ella Fitzgerald's rendition of "Manhattan." This is a song from the mid-20s recorded in the mid-50s. What does it have to do with the 40s? Nothing, until I figured "40s" is a catch-all that means pre-rock popular music.