1. Here comes the sun
2. Good day sunshine
3. I'll follow the sun
4. Any time at all (If the sun has faded away)
5. Yellow Submarine (So we sailed on to the sun)
6. Two of us (Two of us wearing raincoats Standing so low In the sun - also note the coda: sunshine, you are my sunshine)
7. Dear Prudence (The sun is up, the skies are blue).
8. Good Night (Now the sun turns out his light)
9. I Am The Walrus (Sitting in an English garden waiting for the sun)
10. Lucy in the Sky With Diamonds (Look for the girl with the sun in her eyes and she's gone)
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.