如何用英语表达5月5日上午,有几种方法?

1）in the morning 泛指早上较长的一段时间,而on the morning 指确切的某一个早上.如：
I often do exercise in the morning.
I was born on the morning of March 1st in 1978.
2）in the morning on May 1与on the morning of May 1的区别：
意思都是“五月一日上午”
in the morning on May 1是纯粹的时间从小到大的排序
on the morning of May 1中"of May 1" 是以介词短语的形式作后置定语,修饰mornimg