Question:
What is the date of 2nd Isaiah?
Answer:
Isaiah received his call “in the year that King Uzziah died” (742 B.C.), and his latest recorded activity is dated in 701 B.C. Only chapters 1–39, however, can be assigned to this period. Chapters 40–66 are much later in origin and therefore known as Deutero-Isaiah (Second Isaiah). Second Isaiah (40-55) probably dates to the Babylonian exile (ca 545 B.C.E.). (549-537B.C.)

