We welcomed the new year in with relations and friends, like many others, by getting to one of North London's higher spots, Alexandra Palace, from where we could see fireworks across the city, something we had not done before.
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.