On the day and night, only God knows (Matthew 24:36) when heaven opens up to reveal a sign of Jesus (Matthew 24:30): “The sun shall be turned into darkness, and the moon into blood, before the great and the terrible day of the LORD come” (Joel 2:31).
On the day (night) of the coming of our Lord, Savior and King Jesus the word of God tells us that there will be mouring, screaming, crying, howling, wailing by countless people.
However, for the called in the Kingdom of God, this will commence the gathering unto himself.
“Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by [OUR GATHERING TOGETHER UNTO HIM], whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ” (2 Thessalonians 2:1)
Jesus says: “In that day, he which shall be upon the housetop, and his stuff in the house, let him not come down to take it away: and he that is in the field, let him likewise not return back. Remember Lot’s wife. Whosoever shall seek to save his life shall lose it; and whosoever shall lose his life shall preserve it. I tell you, in that night there shall be two men in one bed; the one shall be taken, and the other shall be left. Two women shall be grinding together; the one shall be taken, and the other left. Two men shall be in the field; the one shall be taken, and the other left. And they answered and said unto him, Where, Lord? And he said unto them, ‘Wheresoever the body is, thither will the eagles be gathered together’” (Luke 17:31-37).
“And it shall come to pass, that whosoever shall call on the name of the LORD shall be delivered: for in mount Zion and in Jerusalem shall be deliverance, as the LORD hath said, and in the remnant whom the LORD shall call” (Joel 2:32).