Not only that in explicit statement, but about a dozen parables describing the end of the world coming by surprise; A thief in the night.
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)