There are a few of note; some good, some not so good! The list started off easy but it became progressively more difficult later on in the week:
New Order - Blue Monday
Rolling Stones - Ruby Tuesday
Simon and Garfunkel - Wednesday Morning, 3AM (no too many Wednesday songs about!)
Thursday is not represented on my iPod, but there is a song by Jim Croce (crochet!) called Thursday. It was either than or some fairly recent song called 'Thursday's Child by David Bowie that's not that good, or an instrumental by Brian Eno.
The Cure - Friday I'm In Love
Or you could have this monstrosity...
Elton John - Saturday Night's Alright for Fighting
covered famously by Nickelback also, less said the better...
Daniel Boone - Beautiful Sunday, an epic from the Safeway end at Forthbank, circa 1997