'Day of the Lord' in the Bible

The Lord utters His voice before His army,For His camp is very great,Because strong and powerful is he who [obediently] carries out His word.For the day of the Lord is indeed great and very terrible [causing dread];Who can endure it?

“But I will remove the northern army far away from you,And I will drive it into a parched and desolate land,With its forward guard into the eastern sea (Dead Sea)And with its rear guard into the western sea (Mediterranean Sea).And its stench will arise and its foul odor of decay will come up [this is the fate of the northern army in the final day of the Lord],For He has done great things.”

“The sun will be turned into darknessAnd the moon into bloodBefore the great and terrible day of the Lord comes.

Multitudes, multitudes in the valley of decision (judgment)!For the day of the Lord is near in the valley of decision [when judgment is executed].