1 On January 1st(念起来是January the first) 2 On February 2nd1st(念起来是February the second）3 My birthday is March 3rd.= I was born on March 3rd.1st(念起来是March the third)
4 Your birthday is October 9th.= You are born on October 9th.1st(念起来是October the nineth)
5 She was born in December.= Her birthday is in December.注意有具体日期用on,只有月份年份用in
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