I believe the song is an early 70's or a late 60's song.. kind of like a hippie love song... it goes something like this;

Sunday Sunday. La la, la la la la laaaa. Sunday morning couldn't guarantee... that Monday morning... would be there for me..
Every other day, every other day... fine.. all of the time...

Are you sure it's Sunday, Sunday?
I'm familiar with a song from that era called
Monday, Monday

Yes.. That's it... Is it sung by the mamas and the papas?

Pretty sure the Mama's and Papa's

Yes.. Thats it..... Is it sung by the mamas and the papas?


Yes -

Monday, Monday, so good to me;
Monday morning, it was all I hoped it would be.
Oh, Monday morning, Monday morning couldn抰 guarantee
That Monday evening you would still be here with me.
Monday, Monday, can抰 trust that day;
Monday, Monday, sometimes it just turns out that way.
Oh, Monday morning, you gave me no warning of what was to be.
Oh, Monday, Monday, how could you leave and not take me?
Every other day, every other day
Every other day of the week is fine, yeah.
But whenever Monday comes---but whenever Monday comes
You can find me crying all of the time.
Monday, Monday, so good to me;
Monday morning, it was all I hoped it would be.
But Monday morning, Monday morning couldn抰 guarantee
That Monday evening you would still be here with me.
Every other day, every other day
Every other day of the week is fine, yeah.
But whenever Monday comes---but whenever Monday comes
You can find me crying all of the time.
Monday, Monday, can抰 trust that day;
Monday, Monday, it just turns out that way.
Oh, Monday, Monday, won抰 go away;
Monday, Monday, it抯 here to stay.
Oh Monday, Monday
Oh Monday, Monday