940 B
In the eighth month
This is the eighth month of the Hebrew calendar. It is during the last part of October and the first part of November on Western calendars. (See: rc://en/ta/man/translate/translate-hebrewmonths and rc://en/ta/man/translate/translate-ordinal)
the second year of Darius' reign
"the second year of the reign of Darius the king" or "the second year since Darius became king" (See: rc://en/ta/man/translate/translate-ordinal)
the word of Yahweh came
This idiom is used to introduce a special message from God. Alternate translation: "Yahweh gave a message" or "Yawheh spoke this message" (See: rc://en/ta/man/translate/figs-idiom)
Yahweh
This is the name of God that he revealed to his people in the Old Testament. See the translationWord page about Yahweh concerning how to translate this.
Berekiah ... Iddo
These are the names of men. (See: rc://en/ta/man/translate/translate-names)