When does the Church Age end?

The Church Age ends at the Rapture, soon followed by the Tribulation when God fulfils His promise of Genesis 12 that in Israel will all the families of the earth be blessed. That will happen with the calling out and the ministry of the 144,000 Jewish Evangelicals of Revelation 7:1-14, who will take the gospel to every tongue, tribe and nation and great numbers of people will come to know the Lord as cited in Isaiah 26:9:

"With my soul I have desired You in the night, yes, by my spirit within me I will seek You early; for when Your judgments are in the earth, the inhabitants of the world will learn righteousness."