What WAS the February 17th, 2009 DTV deadline date?

Congress passed a law on February 1, 2006, setting a final deadline for the DTV transition of February 17, 2009. This 'final' deadlines has been extended by Congress to June 12, 2009. Many television stations will continue broadcasting both analog and digital programming until June 12th, when most analog broadcasting will finally stop.  Only a handful of low-power, hyperlocal stations will remain.

Analog TVs receiving over-the-air programming will still work after that date, but owners of these TVs will need to buy converter boxes to change digital broadcasts into analog format.

Cable and satellite subscribers with analog TVs should contact their service providers about any additional equipment needed for the DTV transition.

Source:  http://www.dtv.gov