'Age' in the Bible

and the world doth pass away, and the desire of it, and he who is doing the will of God, he doth remain -- to the age.

Children, it is the last hour [the end of this age]; and just as you heard that the antichrist is coming [the one who will oppose Christ and attempt to replace Him], even now many antichrists (false teachers) have appeared, which confirms our belief that it is the last hour.