Engage in novel activities - time "speeding up" is pretty common as you age. Read about it here: http://www.npr.org/templates/story/story.php?storyId=1223225...
Why would we want to take the perceptions of the criminal into account when sentencing?
It is totally opposite, a year is much more precious to me now.
Count the number of good years you have left, with the health+energy to do what you want. I heard this week that the knees are failing on a relative of a friend, which is my age.
When you were young, the years stretched in front of you, endlessly.
These days I think things like "Japan is so fascinating that I would love to live there a while, but I just can't use a work year to learn the language and the writing system. I need that time for other things."
Perhaps we need an age-related transform to prison sentences.