What if? #2

First, I'd like to congratulate Jenny C for winning the autographed copy of Calli Be Gold by Michele Weber Hurwitz! To read an excerpt from this fun middle grade novel click here.

And now for the What if? question of the Week. 

What is this? I'm glad you asked. It's a random question that happened to pop in my head, which I decided to post on my blog on Thursdays to help bridge the gap between hump day and Friday.  

Today’s question: What if time moved backwards?

How would that work? Would we start out adults? And would we possess the knowledge of someone in their nineties and then get younger each year? The saying “if I knew then what I know now” would be obsolete.  And you definitely wouldn’t want to tick off the people around you, because someone is going to have to look after you when you’re an infant.
Maybe it just means the sun would set before it rises. That might not be too weird. Unless it meant we’d moved through our day as if someone pressed rewind. You know, like a movie played backwards. But then the outcome of everything would happen before we actually executed any plans.
Any sci-fi fans out there? Do you know how this works, because I’m really at a loss?