'Day' in the Bible

The Lord is good, a strong place in the day of trouble; and he has knowledge of those who take him for their safe cover.

The body-covers of his fighting men have been made red, the men of war are clothed in bright red: the war-carriages are like flames of fire in the day when he gets ready, the horses are shaking.

Your crowned ones are like the locusts, and your scribes like the clouds of insects which take cover in the walls on a cold day, but when the sun comes up they go in flight, and are seen no longer in their place.