Against the Day Title
In his review of Against the Day in the Wall Street Journal, Alexander Theroux (author of Darconville's Cat and the upcoming Laura Warholic; or The Sexual Intellectual) traces the title of Pynchon's novel back to the Bible, 2 Peter 3:7.:
(5) For this they willfully forget, that there were heavens from of old, and an earth compacted out of water and amidst water, by the word of God;
(6) by which means the world that then was, being overflowed with water, perished:
(7) but the heavens that now are, and the earth, by the same word have been stored up for fire, being reserved against the day of judgment and destruction of ungodly men.
(8) But forget not this one thing, beloved, that one day is with the Lord as a thousand years, and a thousand years as one day.
(Source: American Standard Bible)