What is the difference between "beyond" and "after" when relating to "time"

Both are correct. Beyond can be used to describe time and space (and other things, e.g. "this is beyond the scope of this investigation.").

i think

beyond can use to describe far things

e.g: sun beyond moon

if you want more idea i can give you word (behind): some thing near

e.g: Fadi tables behind Tom tables

behind = beyong

almost

<<I think the party will go until after midnight>>

I do not agree with the usage of "until after" in the sentence above.

You need go on:

http://query.nytimes.com/gst/fullpage.html?res=990DE2DE133BF933A05751C1A962958260

Alcohol-free activities for adults and children are to start at Bryant Park at 11 A.

Fadi, Oxford says that you can use "beyond" with this meaning:
2) later than a particular time:
It won’t go on beyond midnight. Ç I know what I’ll be doing for the next three weeks but I haven’t thought beyond that.

belly,

it is new information

thanks..

I will get bonus if I sit beyond 8.30 p.m. it means if I go at 8.30 p.m. I will get bonus