Time

I always find it amazing how fast time goes by.  One thing you know you are in school and you can't wait get out.  Then you're done, married, and have kids.  Next thing you know, I'll be retired.  Well maybe not.  It's just hard to imagine how things go so quickly.  Tomorrow my kids will be married and out of the house and there will be grandkids running around.  What happens to the time?