'Seventeenth' in the Bible

In the six hundredth year of Noah’s life, on the seventeenth day of the second month, on that same day all the fountains of the great deep [subterranean waters] burst open, and the windows and floodgates of the heavens were opened.

On the seventeenth day of the seventh month [five months after the rain began], the ark came to rest on the mountains of Ararat [in Turkey].