下午,具体某一天下午,特指某一天下午,分别用英语怎么说?

具体指某一天下午用on （句子中有具体日期和星期）
on Friday afternoon
on the afternoon of January 1st

下午： afternoon
短语：in the afternoon
具体某一天下午，全部用介词on
on yesterday / tomorrow/ this afternoon (这里on省略)
on the afternoon of April 1st
on Monday aternoon

in the afternoon 在下午
On Sunday afternoon 在周末的下午

下午 afternoon; post meridiem (p. m.):

下午：afternoon
具体某一天下午：（举例）in the afternoon,April 1,2011
特指某一天下午：（举例）Monday afternoon

例如，on Sunday afternoon, on the afternoon of May 23rd, 2011 , on the afternoon of my sister's birthday on the afternoon of the football match , on the afternoon (when ) he died / arrived.

下午泛指是Afternoon 特指的话是In that afteroon 或者是in the afternoon of 某某特殊时间点。