Congress mandated that the last day for full-power television stations to broadcast in analog would be February 17, 2009, over-the-air TV broadcasts will be in digital only after that date. If you have one or more televisions that receive free over-the-air television programming (with a roof-top antenna or “rabbit ears” on the TV), the type of TV you own is very important. A digital television (a TV with an internal digital tuner) will allow you to continue to watch free over-the-air programming after February 17, 2009. However, if you have an analog television, you will need a digital-to-analog converter box to continue to watch broadcast television on that set. This converter box will also enable you to see any additional multicast programming that your local stations are offering.
Your source for HDTV television news and "The Big Switch." – This site contains affiliate links for which I may be compensated.