You can Schedule a post from the Posting Window. In the Description field you'll find the word "Now" which you can interact with. It will open up a calendar-like menu, which will allow you to set a date and time for that post to be Published.
After you set those, you'll see the Post button at the bottom of the window with change to "Schedule Post".
All of your Scheduled posts can be found in the Scheduled tab on your Timeline and can be interacted with using the Publishing Options, if so desired.