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
Catechism number 1002
Christ will raise us up "on the last day"; but it is also true that, in a certain way, we have already risen with Christ. For, by virtue of the Holy Spirit, Christian life is already now on earth a participation in the death and Resurrection of Christ: