That joke was around long before Sesame Street.
This wasn’t in the South, and Playboy magazine was well known at the time for their playmates of the month, hence Miss September. She was not amused after hearing the “joke” from far too many guys.
I know two Septembers. Canadian Decembers can be cold and dark and seem to be better for making than naming.
You can actually track the popularity of names here:
The answer is clearly no. Both were had some minimal usage late ‘60s for a few decades but were never by any stretch common names.
Fletcher Christian’s first son was named Thursday October Christian, because he was born on that day in that month.
“Wednesday”?! What a horrible name for a girl. I’m glad my parents gave me a name they figured I would like as opposed to something I would want to legally change on the first day I became an adult.
I rather like it! I mean, I wouldn’t have conferred it upon any daughter I fathered (I’d have gone with Grace), but it has a certain ring to it.
Tuesday Weld was was something of a sensation because of her unusual first name. Wednesday Addams was presumably named based on the line “Wednesday’s child is full of woe”.