'Day' in the Bible

Jehovah is good, a stronghold in the day of trouble; and he knoweth them that take refuge in him.

The shield of his mighty men is made red, the valiant men are in scarlet: the chariots flash with steel in the day of his preparation, and the cypress'spears are brandished.

Thy princes are as the locusts, and thy marshals as the swarms of grasshoppers, which encamp in the hedges in the cold day, but when the sun ariseth they flee away, and their place is not known where they are.