'Day' in the Bible

Yahweh is good--a refuge in [the] day of distress; [he knows] those who take refuge in him.

The shields of his warriors [are] dyed red; The powerful men [are] dressed in scarlet. The metal of the chariots [shines] like fire {on the day of battle}, and [their] spears quiver.

Your officials [are] like locusts; your commanders [are] like a swarm of locusts. They encamp on the walls on a cold day; when the sun rises, they fly away-- no one knows where they have gone.