'Days' in the Bible

Now it happened after the death of Saul, when David had returned from the slaughter of the Amalekites, that he stayed two days in Ziklag.

When your days are fulfilled and you lie down [in death] with your fathers (ancestors), I will raise up your descendant after you, who shall be born to you, and I will establish his kingdom.

The advice of Ahithophel, which he gave in those days, was as if a man had consulted the word of God; that is how all Ahithophel’s counsel was regarded by both David and Absalom.

Now the king said to Amasa [the commander of his army], “Summon the [fighting] men of Judah to me within three days, and be present here yourself.”

There was famine in the days of David for three consecutive years; and David sought the presence (face) of the Lord [asking the reason]. The Lord replied, “It is because of Saul and his bloody house, because he put the Gibeonites to death.”

He handed them over to the Gibeonites, and they hanged them on the hill before the Lord, and the seven died together. They were put to death in the first days of the grain harvest, the beginning of the barley harvest [in the spring].

So when they had gone about through all the land [taking the census], they came to Jerusalem at the end of nine months and twenty days.

So Gad came to David and told him, and said to him, “Shall seven years of famine come to you in your land? Or will you flee three months before your enemies as they pursue you? Or shall there be three days of pestilence (plague) in your land? Now consider this and decide what answer I shall return to Him who sent me.”