After watching the citroen advert on tv I thought I’d try my first tab. Im not sure on
the ending whether it goes Bb C Bb F instead of Bb C C7 F, but either sounds ok.
Regards Steve
Sadler71steve@hotmail.com

F (sustain chords)Dm	       Gm	          C
Sunday Monday     Happy Days, Tuesday Wednesday Happy Days,
A               Dm             Bb 	 C        Bb    C
Thursday Friday Happy Days The weekend comes My cycle hums,
C        C7         C7   F              Dm  Bb        C         
Ready to race to    you. These days are all Happy and Free (Those Happy Days)
F              Dm  Bb              C
These days are all Share them with me (oh baby)
F(once)			F(once)	
Goodbye grey sky hello blue. 
Bb (once)	Bb A Ab G (once each)
There's nothing can hold me when I hold you.
G (once)	    G (once)        C (once)    C (once)       C7
Feels so right, it can't be wrong. Rockin' and rollin' all week long.

Instrumental    (x2)   |F	|Dm 	|Bb	C

Verse 2 (same chords)
Sunday, Monday, Happy Days. Tuesday, Wednesday, Happy Days.
Thursday, Friday, Happy Days. Saturday, What a day,
Groovin' all week with you.

These days are all, Share them with me. (Those Happy Days)
These days are all, Happy and Free. (oh baby)
F	     Dm                 Bb
These Happy Days are your's and mine.
            C                   Bb C  C7 F
These Happy Days are your's and my Happy Days.

(For instrumental to go along with the above chords :-

Hold a bar with your first finger on the 5th fret top three strings
Then play these notes altering the length of the note as necessary
The 3rd string fifth fret is the C starting point. If I knew how to insert a tab here I would have done.
C D E F G A D(SUSTAIN) G F E D 
C D E F G A D(SUSTAIN) A G E D)