Actually, it says PRECISELY THE OPPOSITE:
No, it doesn't. It says that those in darkness won't see it coming. Those that are of the light will know:
1Th 5:1 But of the times and the seasons, brethren, ye have no need that I write unto you.
1Th 5:2 For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
1Th 5:3 For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.
1Th 5:4 But ye, brethren, are not in darkness, that that day should overtake you as a thief.
1Th 5:5 Ye are all the children of light, and the children of the day: we are not of the night, nor of darkness.
1Th 5:6 Therefore let us not sleep, as do others; but let us watch and be sober.
(e-sword:KJV)
The times and seasons are the Holy Days of Yahweh, and one of them is known as 'the day that no man knoweth.'
It is unfortunate that one came who had the hubris to think to change the Holy Days - That is why those in darkness will not know... And the Holy Days did *not* change, as those who sought to change them did not have authority to do so.
>> But ye, brethren, are not in darkness, that that day should overtake you as a thief. <<
That does not say that they shall know the time. If it did, it would contradict directly the words of Jesus, who said you will not know the day nor the hour. It only means that they will be prepared, because they will remain always vigilant.