The Bible tells us that God’s elect did know time and judgement so that they could blow the trumpet and warn the people of the world before that evil day come upon them.
For if the trumpet give an uncertain sound, who shall prepare himself to the battle? – 1 Corinthians 14:8 KJV
14 The great day of the LORD is near, it is near, and hasteth greatly, even the voice of the day of the LORD: the mighty man shall cry there bitterly. 15 That day is a day of wrath, a day of trouble and distress, a day of wasteness and desolation, a day of darkness and gloominess, a day of clouds and thick darkness, 16 A day of the trumpet and alarm against the fenced cities, and against the high towers. – Zephaniah 1:14-16 KJV
1 Gather yourselves together, yea, gather together, O nation not desired; 2 Before the decree bring forth, before the day pass as the chaff, before the fierce anger of the LORD come upon you, before the day of the LORD’S anger come upon you. 3 Seek ye the LORD, all ye meek of the earth, which have wrought his judgment; seek righteousness, seek meekness: it may be ye shall be hid in the day of the LORD’S anger. – Zephaniah 2:1-3 KJV
But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption: – 1 Corinthians 1:30 KJV
4 And Jonah began to enter into the city a day’s journey, and he cried, and said, Yet forty days, and Nineveh shall be overthrown. 5 So the people of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them. 6 For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes. 7 And he caused it to be proclaimed and published through Nineveh by the decree of the king and his nobles, saying, Let neither man nor beast, herd nor flock, taste any thing: let them not feed, nor drink water: 8 But let man and beast be covered with sackcloth, and cry mightily unto God: yea, let them turn every one from his evil way, and from the violence that is in their hands. 9 Who can tell if God will turn and repent, and turn away from his fierce anger, that we perish not? 10 And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did it not. – Jonah 3:4-10 KJV
I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things. – Isaiah 45:7 KJV