When is Zechariah 14:16 happening, according to those that reject a literal millennium kingdom on Earth?

>Everyone who is left of all the nations that came against Jerusalem will go up year after year to bow down to the King, the LORD of hosts, and to celebrate the feast of Booths. 17 Should any of the families of the earth not go up to Jerusalem to bow down to the King, the LORD of hosts, then there will be no rain for them. 18 And if the family of Egypt does not go up or enter, upon them will fall the plague, with which the LORD strikes the nations that do not go up to celebrate the feast of Booths. 19 This will be the punishment of Egypt and the punishment of all the nations that do not go up to celebrate the feast of Booths (Zech. 14:16-19, NABRE). How does this fit into the eschatological timeline, specifically of those who see the millennium as a symbol of the Christian age?