'Day' in the Bible

"But who can endure the day of his coming? And who will stand when he appears? For he is like a refiner's fire, and like launderer's soap;

They shall be mine," says Yahweh of Armies, "my own possession in the day that I make, and I will spare them, as a man spares his own son who serves him.

"For, behold, the day comes, it burns as a furnace; and all the proud, and all who work wickedness, will be stubble; and the day that comes will burn them up," says Yahweh of Armies, "that it shall leave them neither root nor branch.

You shall tread down the wicked; for they will be ashes under the soles of your feet in the day that I make," says Yahweh of Armies.

Behold, I will send you Elijah the prophet before the great and terrible day of Yahweh comes.