'Former Days' in the Bible

He shall separate to the LORD the days of his separation, and shall bring a male lamb a year old for a trespass offering; but the former days shall be void, because his separation was defiled.

Do not say, "Why were the former days better than these?" For you do not ask wisely about this.

But now I will not be to the remnant of this people as in the former days," says the LORD of hosts.

But remember the former days, in which, after you were enlightened, you endured a great struggle with sufferings;