“Then I looked when the Lamb opened the sixth seal, and a huge earthquake took place; the sun became as black as sackcloth made of hair, and the full moon became blood-red, and the stars in the sky fell to the earth like a fig tree dropping its unripe figs when shaken by a fierce wind. The sky was split apart like a scroll being rolled up, and every mountain and island was moved from its place. Then the kings of the earth, the very important people, the generals, the rich, the powerful, and everyone, slave and free, hid themselves in the caves and among the rocks of the mountains. They said to the mountains and to the rocks, “Fall on us and hide us from the face of the one who is seated on the throne and from the wrath of the Lamb, because the great day of their wrath has come, and who is able to withstand it?”” (Revelation 6:12–17)
Ryan Habbena does a great job of unpacking the “end times” Scriptures showing that the “celestial signs” as revealed at the sixth seal in the Scripture above, by Jesus in the Olivet discourse, by Joel, by Daniel, and by Paul, is the major sign that precedes the rapture of the Saints, first those dead in Christ, and then those that are alive on this earth.