在五一节那天 On May Day
在五一国际劳动节 on May Day
在五·一节 on May Day
在五一节假期 during this May Day holiday
在十一月五日 on the fifth of November
在五月一日 On May the first ; on the first of May
现在是五点一刻 it's a quarter past five
在五月一个美妙的早晨 one wonderful morning in may
在十一点五十分之前 before eleven fifteen
在周末/在周一到周五 at the weekends/on the weekdays
校长杨波说，在五一假期来临之际，学校各个年级的学生一起在田间劳作。
In the days coming up to the May Day holiday, students of various grades at the school worked together in the fields, says school principal Yang Bo.
在五一假日中，你收到了多少邀请函呢？
During the May holiday, how many invitations have you gotten?
我很高。我在五一班读书。
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