'Days' in the Bible

They observed the Festival of Unleavened Bread for seven days with joy, because the Lord had made them joyful, having changed the Assyrian king’s attitude toward them, so that he supported them in the work on the house of the God of Israel.

I gathered them at the river that flows to Ahava, and we camped there for three days. I searched among the people and priests, but found no Levites there.

So we arrived at Jerusalem and rested there for three days.

Our guilt has been terrible from the days of our fathers until the present. Because of our iniquities we have been handed over, along with our kings and priests, to the surrounding kings, and to the sword, captivity, plundering, and open shame, as it is today.

Whoever did not come within three days would forfeit all his possessions, according to the decision of the leaders and elders, and would be excluded from the assembly of the exiles.

So all the men of Judah and Benjamin gathered in Jerusalem within the three days. On the twentieth day of the ninth month, all the people sat in the square at the house of God, trembling because of this matter and because of the heavy rain.