happening too soon or earlier than usual
premature
take action in or to prevent an anticipated event from happening ; forestall
preempt
cause or arrange for something to take place at a time later than that first scheduled
postpone
occurring in the southern U.S. during the before the American Civil War
antebellum
something that is done to prevent possible harm or trouble from happening in the future
precaution
thing or event that existed before or logically occurs before another
antecendent
all future generations of people
posterity
to say that something will happen in the future; to predict something, such as the weather after looking at the information that is available
forecast
near or toward the back of something; the back side
posterior
the ability to see what will or might happen in the future
foresight