#When did the word of Yahweh come by the hand of Haggai the prophet?

The word came in the seventh month on the twenty-first day of the month. [2:1]

What did Yahweh declare would happen on the day he shook, overthrew, and destroyed the heavens, the earth, and kingdoms?

The horses and their riders would fall down, each one one because of his brother's sword, and Yahweh would take Zerubbabel as his servant 2:21-22].