Kommentar zu Ijow 3:3

in which I was to be born This is a future expression, that he was saying, “Would that the day in which I was destined to be born be lost, and then I would not have been born.”

Convinced that the shattering series of catastrophes that had befallen him was totally unwarranted and that, as such, it could not have originated with God, for that would imply an imperfection in His Governance, Job attributes its occurrence to the bad luck of his birth, namely, to his horoscope. In which case, it would have been better had he never been conceived or born.

and the night That too should have been lost.