Joel 2:31-32 (WEB) — 31 The sun will be turned into darkness, and the moon into blood, before the great and terrible day of YHWH comes. 32 It will happen that whoever will call on YHWH’s name shall be saved; for in Mount Zion and in Jerusalem there will be those who escape, as YHWH has said, and among the remnant, those whom YHWH calls. For the average person, there is no point, of reference, imagined or actual, for just how terrible this day will be. I re-discovered some telling information while reading another book I enjoy, The Book of Jasher (CCE). Chapter 6:9-13 9 — Two and two came to Noah into the ark, but from the from the clean animals, and clean fowls, he brought seven couples, as God had commanded him. 10 And all the animals, and beasts, and fowls, were still there, and they surrounded the ark at every place, and the rain had not descended til seven days after. 11 And on that day, the Lord caused the whole earth to shake, and the sun darkened, and the foundations of the world raged, and the whole earth was moved violently, and the lighting flashed, and the thunder roared, and all the foundations in the earth were broken up, such as was not known to the inhabitants before; and God did this mighty act, in order to terrify the sons of men, that there might be no more evil upon earth. 12 And still the sons of men would not return from their evil ways, and they increased the anger of the Lord at that time, and did not even direct their hearts to all this. 13 And at the end of seven days, in the six hundredth year of the life of Noah, the waters of the flood were upon the earth. As in the past, this will mark a day of judgement. The people won’t act much differently than the previous time this sign appeared, in the time of Noah; they will care less until judgement is upon them. Isaiah 66:15 (WEB) — 15 For, behold, YHWH will come with fire, and his chariots will be like the whirlwind; to render his anger with fierceness, and his rebuke with flames of fire.16 For YHWH will execute judgment by fire and by his sword on all flesh; and those slain by YHWH will be many. I encourage you to read the Book of Jasher, if you have not already; there are many details this book can help bring into context.