1. Exposition

When was the seventh year of Artaxerxes?

Ezra 7:7 (ESV)

7 And there went up also to Jerusalem, in the seventh year of Artaxerxes the king, some of the people of Israel, and some of the priests and Levites, the singers and gatekeepers, and the temple servants.

Artaxerxes began his reign as king of Persia in 465 BC, so his seventh year would then be 458 (or 457).