"It shall happen in the latter days" (2:2). When are the latter days, and has "swords into plowshares" (2:4) happened yet?

In Hebrew the latter days is be'acharit hayamim (tap latter days). The Hebrew Bible has the phrase thirteen times, from Jacob's "in the days to come" (Genesis 49:1) to Micah's own "But in the latter days" (Micah 4:1), and this is its only time in Isaiah. The chapter gives no date. What it does give is what will happen: the mountain of the LORD's house "shall be raised above the hills; and all nations shall flow to it" (2:2); the peoples will say, "he will teach us of his ways, and we will walk in his paths" (2:3); "For the law shall go out of Zion, and the LORD’s word from Jerusalem" (2:3); "He will judge between the nations" (2:4); and "Nation shall not lift up sword against nation, neither shall they learn war any more" (2:4). Christians read when and how these words are kept in more than one way. The notes on Isaiah 65, which speaks of "new heavens and a new earth" (65:17), set out the main readings of that chapter's picture, each resting on its verses; these notes point there and choose none. What the chapter does say is who judges: "He will judge between the nations" (2:4), the God of Jacob who "will teach us of his ways" (2:3). These notes apply the words to no nation, war or peace of today.