In 1 Thessalonians 5:2, the Day of the Lord will come like what?

Answer: A thief in the night

Paul says the Day of the Lord will come like a thief in the night, bringing sudden destruction while people say, "Peace and security."

“For you are fully aware that the Day of the Lord will come like a thief in the night. While people are saying, “Peace and security,” destruction will come upon them suddenly, like labor pains on a pregnant woman, and they will not escape.”— 1 Thessalonians 5:2-3 (BSB)