Alright so the default value is listed as such:
Crime - Days in Prison 
* Number of Days to advance the calender when serving prison time.
Now I have tinkered with this but I cannot for the life of me figure out what it actually does. It does NOT, at default value, advance the game 100 days when you serve your jail time by sleeping on the cot. Not even at maximum bounty, it is 7 days served for 10,000 bounty.
Anybody have any clues as to what this actually corresponds to? Searching around the web came up with nothing. I understand the definition should be straightforward, but as I understand it, its not doing what I think it should be doing.