'Day' in the Bible

And who is bearing the day of his coming? And who is standing in his appearing? For he is as fire of a refiner, And as soap of a fuller.

And they have been to Me, said Jehovah of Hosts, In the day that I am appointing -- a peculiar treasure, And I have had pity on them, As one hath pity on his son who is serving him.

For, lo, the day hath come, burning as a furnace, And all the proud, and every wicked doer, have been stubble, And burnt them hath the day that came, Said Jehovah of Hosts, That there is not left to them root or branch,

And ye have trodden down the wicked, For they are ashes under the soles of your feet, In the day that I am appointing, Said Jehovah of Hosts.

Lo, I am sending to you Elijah the prophet, Before the coming of the day of Jehovah, The great and the fearful.