As far as moving forward in time is concerned.

I previously noted how enamored I've become of the music of the 1940s, thanks to satellite radio. (Sirius/XM's
'40s on 4.)
I've recently moved up a notch, allowing myself to be serenaded by the
'50s on 5, as I was yesterday evening while making chocolate peanut clusters. (Recipe to follow in a later post.)
After listening extensively to these two channels during the past few weeks, I've concluded that Sirius/XM subscribes to my theory of the history of popular music. Which is that the 40s ended and the 50s began in 1955 -- an observation based strictly on chart position and airplay.
Here's some of the evidence.
"
Rock Around the Clock" by
Bill Haley and his Comets debuts on Billboard's
Top Pop Singles on May 14, 1955, and eventually spent 8 weeks at #1.
Fats Domino makes his first
Top Pop chart appearance on July 16 with "
Ain't That a Shame", covered in a #1 version, which hit the chart a week earlier, by Mr. Whitebread himself Pat
Boone. Fats' version made it to #10.
Chuck Berry. "
Maybellene". August 20, 1955. Climbing as high as #5.
Not to mention the one-hit wonder of The Turbans' "
When You Dance". November 11. Although it peaked at #33, it enjoyed a 21-week run.
The Old Guard, however, did not leave the stage willingly.
The top songs at the end of 1955, when I was a kindergartner at
Whittier Elementary School in Great Falls Montana, favored those with conservative musical tastes.
"
Sixteen Tons" (
Tennessee Ernie Ford)
"
Autumn Leaves" (
Roger Williams)
"
Love is a Many-Splendored Thing" (
Four Aces. And the beat goes on.)
"
Moments to Remember" (
Four Lads)
And then came
Elvis and "
Heartbreak Hotel" on March 3, 1956, his first single spending 8 weeks at #1 and 27 weeks on what had then become Billboard's Hot 100.
Coincidentally,
Carl Perkins' version of "
Blue Suede Shoes" also debuted on March 3rd and spent four weeks at #2. (Elvis's version began its chart run a month later and peaked at #20.)
1956 was also a big year for
Little Richard: "
Tutti Frutti", "Long Tall Sally", and "Rip It Up".
(For those of you wondering, I'm using print (!!) as a source for these facts and figures:
Joel Whitburn's Top Pop Singles 1955-1990, a compilation based on
Billboard's charts.)
I suspect that if I listen to Sirius/XM "
'60s on 6", I'll confirm my theory that the 1960s, musically speaking, started in 1964, when the Beatles cleared the way for a British invasion.
Here's the top 10 from Billboard's Hot 100 for the week ending December 28, 1963.
1. "Dominique" (
The Singing Nun). Actually, I should be able to stop right here, but I won't.
2. "There! I've Said It Again" (
Bobby Vinton. A big hit for Vaughn Monroe in 1945, who also sang this
great song.)
3. "Louie Louie" (Kingsmen -- giving birth to
garage rock.)
4. "
Since I Fell for You" (
Lenny Welch. Call me old-fashioned, but I really love this song.)
5. "
You Don't Have to be a Baby to Cry" (Caravelles)
6. "Drip Drop" (
Dion DiMuci -- definitely lesser Dion)
7. "Forget Him" (
Bobby Rydell.
Still touring!)
8. "Popsicles and Icicles" (
Murmaids. Whoda thought there'd be demand for a reunion tour?)
9. "Talk Back Trembling Lips" (
Johnny Tillotson), appearing at the Surf Ballroom in Clearlake, Iowa, on January 29, 2009.)
10. "Be True to Your School" (
Beach Boys, making waves for more than a year at this point)
By early April 1964, the
Beatles had achieved the unprecedented, and still unequalled, feat of charting the top 5 songs on the Hot 100: "Can't Buy Me Love", "Twist and Shout", "She Loves You", "I Want to Hold Your Hand", and "Please Please Me".
So when did the '
70s start?