displaying sheduled posts

I’m making a site with activities. They have to be ordered by date, taking into account that some have already passed (and serve as promotion) while others still have to take place.
I think the easyest thing to keep track of time is to use the built-in timestamp of posts.

I’d like to use wordpress to show all the activities; also the ones in the future.
How can I show posts that are sheduled?

(i would like to make some automatic categorisation of what is within the next week, or what has already passed)