CCC 1001

When? Definitively "at the last day," "at the end of the world."⁵⁵⁵ Jn 6: 39-40, 44, 54; 11:24; LG 48 # 3. Indeed, the resurrection of the dead is closely associated with Christ's Parousia:

For the Lord himself will descend from heaven, with a cry of command, with the archangel's call, and with the sound of the trumpet of God. and the dead in Christ will rise first.⁵⁵⁶ 1 Thess 4:16.