How many songs can we come up with that have day names in their title? The posts probably won’t end up ordered any specific way.
“Sunday Morning” - Acid House Kings
“Sunday Morning” - Velvet Underground
“Sunday Morning Coming Down” - Johnny Cash
“Sunday Will Never be the Same” - Spanky and Our Gang
“Monday, Monday” - The Mamas and The Papas
“Friday I’m in Love” - The Cure
“Never on Sunday” - not sure who performs it
“Manic Monday” - Banarama
“Ruby Tuesday” - Rolling Stones
“Friday’s Child” - Will Young
“Saturday Night’s All Right for Fighting” - Elton John
“S-A-T-U-R-D-A-Y Night” - Bay City Rollers
“Gloomy Sunday” - A pair of dead Hungarians 
I know a lot of ‘Sunday’ music for an atheist.
Stormy Monday – Allman Brothers (and many others)
Rainy Days and Mondays – Carpenters
Forever Afternoon (Tuesday?) – Moody Blues (usually known as “Tuesday Afternoon”)
Friday on My Mind – Easybeats
She Gets Paid on Friday – (don’t recall the artist – Elvis Costello, maybe).
Another Saturday Night – Sam Cooke/Cat Stevens
Does “Yesterday” count?
Tell Me on a Sunday–Song & Dance cast recording
Probably on Thursday–Ross Hannanstein
I Don’t Like Mondays – The Boomtown Rats
“Sun Comes Up, It’s Tuesday Morning” - Cowboy Junkies
Sunday, Bloody Sunday - U2
Wednesday Week - The Undertones
I think that’s the Bangles, not Bananarama.
Saturday’s Child - The Monkees
Sunday Morning Coming Down - Kris Kristofferson (?)
Come Monday - Jimmy Buffet
Saturday in the Park - Chicago
Sunday in New York - Mel Torme (and others)
Joe Jackson
One More Saturday Night — Grateful Dead.
Tuesday’s Gone by Lynyrd Skynyrd (much better than Free Bird as Skynyrd Songs go, IMHO)
Tuesday’s Dead by Cat Stevens
Blue Monday - Fats Domino
Saturday Night Holocaust - Dead Kennedys
Correct. For some reason the words to Manic Monday were going through my head to the tune of “Robert DeNiro’s Waiting,” so figure that one out.
Only if we include “Tomorrow” from Annie.
Most of my additions are country:
Raining on Sunday - Kieth Urban
I Don’t Have To Be Me ('Til Monday) - Steve Azar
Wednesday Morning, 3 A.M. - Simon & Garfunkel
Louisiana Saturday Night - Mel McDaniel
Small Town Saturday Night - Hal Ketchum
Sunday Morning Coming Down was Johnny Cash.
“One February Friday” - Frankie Goes to Hollywood (B-Side to “Two Tribes”)
“One September Monday” - Frankie Goes to Hollywood (B-Side to “Relax”)
Sunday Sun - Beck
He Forgot That it was Sunday - John Prine
Sunday’s Best - Elvis Costello
Tuesday Morning - the Pogues (well, they call themselves the Pogues, but Shane McGowan wasn’t in the band for this)
Good Friday - Cowboy Junkies
Friday Night, Saturday Monring - the Specials
The Heart of Saturday Night - Tom Waits