'Day' in the Bible

The shields of his warriors are dyed red; the mighty soldiers are dressed in scarlet garments. The metal fittings of the chariots shine like fire on the day of battle; the soldiers brandish their spears.

Your courtiers are like locusts, your officials are like a swarm of locusts! They encamp in the walls on a cold day, yet when the sun rises, they fly away; and no one knows where they are.