By coincidence, I just read 2 novels in a row where the protagonist quotes Kierkegaard. The books are: Straight Cut, by Madison Smartt Bell, and The Moviegoer, by Walker Percy.
Both protagonists are made queasy by the quotidian. Neither actually uses this latinate q-word. One author calls it "dailiness." The other calls it "everydayness."
I had imagined this whole quotidian-as-quandary business came from Heidegger. Nope. It goes back at least to Kierkegaard.
Everyday I learn something new.
What a quotidian thing to do!