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