'Former Days' in the Bible

And he shall set apart to Jehovah the days of his separation, and shall bring a lamb of the first year for a guilt offering. But the former days shall be lost, because his separation was defiled.

Do not say, Why was it that the former days were better than these? For you do not ask wisely in regard to this.

So says the Lord Jehovah: Are you he of whom I have spoken in former days, by the hand of My servants the prophets of Israel, who prophesied in those days and years that I would bring you against them?

But now I will not be to the remnant of this people as in the former days, says Jehovah of Hosts.

But call to memory the former days, in which (after you were illuminated) you endured a great fight of afflictions,