Independence is a condition of a nation, country, or state in which its residents and population, or some portion thereof, exercise self-government, and usually sovereignty, over the territory. The opposite of independence is the status of a dependent territory.
Depending on the state. If it's a four year federal sentence you will have to do 85% ,or they takeoff 54 days a year for good behavior. Most states abdopted the NERA Act for federal funding (No Early Release Act). Meaning if you're incarcerated for a violent crime you will be required to do 85% of your sentence.
Because of the good time statute, you can actually serve less time on a sentence of a year and a day. You can only earn good time or a reduction of approximately 47 days when your original sentence is longer than a year. So a year is 365 days, but a year and a day can be 319.