题目内容：

what is the weather like on the Labor day
是用on,in还是at?

优质解答

用on,具体的日期前用on,所以"在五一劳动节"那一天用介词 on,再如:on Christmas Day
in + 年/ 月/季节,如:in May,in 2010,in summer 等
at + 点种,如:at six,或:at night,at noon