'First' in the Bible

In the first year of Cyrus king of Persia, in order to accomplish the word of Yahweh by the mouth of Jeremiah, Yahweh stirred the spirit of Cyrus king of Persia and he sent a message to all of his kingdom and also [put the message] in writing:

From the first day of the seventh month they began to offer burnt offerings to Yahweh. But the temple of Yahweh was not yet founded.

But many of the elderly priests, Levites, and heads of the families who had seen the first temple, wept with a loud voice when they saw the foundation of this house, but many {shouted aloud with joy}.

But in the first year of King Cyrus of Babylon's reign he issued forth a decree to build this house of God.

In the first year of King Cyrus, he issued forth a decree concerning the house of God in Jerusalem. Let the house be built, the place where sacrifices are offered and let its foundations be raised. Its height [shall be] sixty cubits and its width sixty cubits,

On the fourteenth day of the first month the returned exiles observed the Passover feast.

For on the first day of the first month he began the journey from Babylonia; and on the first day of the fifth month he came to Jerusalem, for the good hand of his God [was] on him.

On the twelfth day of the first month we set out from the river of Ahava to go to Jerusalem. The hand of our God was on us and he delivered us from the hand of the enemy and from ambushing on the way.

The {returned exiles} did so. Ezra the priest selected men, the heads of the {families} according to the house of their fathers, all of them by name. They sat down to examine the matter on the first day of the tenth month.

They finished [investigating] all the men who married foreign women by the first day of the first month.