All of the network's programming has been presented in HD since January 2012 (with the exception of certain holiday specials produced prior to 2005 – such as the Peanuts specials and Rudolph's Shiny New Year – which continue to be presented in 4:3 SD), when Extreme Makeover: Home Edition ended its run as a regular series and One Life to Live (which had been presented in 16:9 standard definition since 2010) also ended its ABC run.
Since January 2012, all ABC programming has been presented in what format?
HD