节日前都加at
具体某一天或某一天的上午，下午，晚上用on
in后面是具体的年/年代或一段时间
指年和月时，用介词 in
In 与月份，季节，年份及一天的某些时间段连用。
He was born in 2007.
He made his first song in July.
I get up early in the morning.
指日期时，用on
On与天、日期和节日连用
He was born on January 8th (the 8th of Jan.).
Their wedding anniversary is on 25th May.
on Mother's Day
指时间时，用at
He arrived at the meeting at 10:30am.
We met in a restaurant at 6 o'clock in the evening.
at night/midnight/lunchtime
at the age of ...
总结：
in + year
on + date
at + time
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024