Which of these names is given to "The Day After Thanksgiving" holiday?

Black Friday is not an official holiday in the United States, but California and some other states observe "The Day After Thanksgiving" as a holiday for state government employees. It is sometimes observed in lieu of another federal holiday, such as Columbus Day. Many non-retail employees and schools have both Thanksgiving and the following Friday off. Along with the following regular weekend, this makes Black Friday weekend a four-day weekend, which is said to increase the number of potential shoppers.

Source: Wikipedia