No BreadOfLife, brothers and sisters in 1 Thess 5:4 is not referring to all people. These people are believers in Christ only. If believers are surprised when that day comes, why does Paul say we do not need to write you about times and dates, and that day will not surprise you like a thief.
Paul says believers are NOT in darkness because we are children of the light and children of the day! Read 1 Thess 5:1-5. If believers are caught off guard at His coming why is Jesus telling us to wake up? Rev 3:3. Do your homework is right.
1 Thess 5:1-11
Now, brothers and sisters, about times and dates we do not need to write to you, 2for you know very well that the day of the Lord will come like a thief in the night. 3While people are saying, “Peace and safety,” destruction will come on them suddenly, as labor pains on a pregnant woman, and they will not escape.
4But you, brothers and sisters, are not in darkness so that this day should surprise you like a thief. 5You are all children of the light and children of the day. We do not belong to the night or to the darkness. 6So then, let us not be like others, who are asleep, but let us be awake and sober. 7For those who sleep, sleep at night, and those who get drunk, get drunk at night. 8But since we belong to the day, let us be sober, putting on faith and love as a breastplate, and the hope of salvation as a helmet. 9For God did not appoint us to suffer wrath but to receive salvation through our Lord Jesus Christ. 10He died for us so that, whether we are awake or asleep, we may live together with him. 11Therefore encourage one another and build each other up, just as in fact you are doing.
Rev 3:3 Remember, therefore, what you have received and heard; hold it fast, and repent.
But if you do not wake up, I will come like a thief, and you will not know at what time I will come to you.