Some are special party boats. These go out for the day or during the night.

VOA: special.2010.03.22

For three months after Simon's death, I worked day and night on my diamond lens.

VOA: special.2009.07.25

"North Korea fed its version of the story to the people, saying the reason Kim looks this way is not because he's lost his health, but because he works day and night for the people, visiting work sites and so on,"

VOA: standard.2009.12.30