Day out:
白天玩了一天 √
例句:
We had a day out in the country.
我们在乡下游玩了一天。
Night out:
晚上在外 X
玩了一晚 √
例句:
They enjoy a night out occasionally.
他们偶尔出去玩一个晚上。
Night school:
夜校 √
例句:
She was accompanied by her brother for the night school.
她与她的兄弟结伴一同去上夜校。
(素材来自学英语口语,如有侵权请联系删除)