in 1996
in 1996.6
on 1996.6.3
on the morning of1996.6.3
at 8'o clock on the morning of 1996.6.3
at 8:15 on the morning of1996.6.3
at 2:00 pm on1996.6.3
in summer
on the day in summer
on the morning of the day in summer
at X:00 on the morning of the day in summer
on Monday
on Monday morning
at X:00 on Monday morning
in May
on Children'r Day 转自高中参考书,保质保量~~