The Last Great Day follows the seven day Feast of Tabernacles. In Ezekiel 37, God speaks of the valley of dry bones where all Israel will be given breath and physical life. Likewise, Christ mentions that the Gentiles will be resurrected also (Matthew 11:21-22). In Revelation 20:5, John writes that “the rest of the dead did not live again until the thousand years were finished.” Here John makes a clear distinction between the first resurrection, which occur at Christ’s second coming (verses 4, 6), and the second resurrection to a physical, flesh and blood existence.
Symbolically, the painting pictures this moment of the second resurrection as a sequence of events: the dry bones become skeletons, are covered with flesh, and come back to life. The elderly, the young, babies, and even those who were in the womb are pictured. This takes place at the end of Christ’s millennial reign when the land is very fertile and the fall harvest very abundant.