This one was released in 1943 and first recorded by Bing Crosby and later by Sinatra. It hit the best seller cart on September 9, 1943, topping out at #9.
In all the letters sent from my Grandfather to his future wife (my Grandmother) from September 23, 1943 until the end of the war, he always signed off with a slight variation... "P.S. I love you Sunday, Monday, and Always"
Awwww, how sweet. I will have to get a copy of that for my WWII Jukebox.
Marion J Chard
Proud Daughter of Walter 'Monday' Poniedzialek
540th Combat Engineer - H&S Company
I just downloaded the MP3 file and am uploading it to the jukebox right now. 
Brian, take a look at this page too: http://www.6thcorpsmusic.us/thanks.htm
Sunday, Monday or Tuesday
Wednesday, Thursday or Friday
I want you near
Every day in the year
Oh, won't you tell me when
We will meet again
Sunday, Monday or always
If you're satisfied
I'll be at your side
Sunday, Monday or always
No need to tell me now
What makes the world go 'round
When at the sight of you
My heart begins to pound and pound
And what am I to do
Can't I be with you
Sunday, Monday or always
Always and forever I must be with you
Beginning Sunday and Monday and then forever
Oh, won't you tell me when
We will meet again
Sunday, Monday or always
If you're satisfied
I'll be at your side
Sunday, Monday or always
No need to tell me now
What makes the world go 'round
When at the sight of you
My heart begins to pound, pound, pound
What am I to do
Can't I be with you
Sunday, Monday or always
Marion J Chard
Proud Daughter of Walter 'Monday' Poniedzialek
540th Combat Engineer - H&S Company