What is "Black Friday" in USA?

[YK1001]

Normally, during Novemember, there will be lots of shops in USA on sale for "Black Friday".

What is Black Friday?  What will happen on Black Friday?

In Hong Kong, Black Friday is a Friday happens to be the 13rd day of the month, with is related to the "unlucky 13".

[NareshDarji]

Black Friday is a shopping day for a combination of reasons. As the first day after the last major holiday before Christmas, it marks the unofficial beginning of the Christmas shopping season. Additionally, many employers give their employees the day off as part of the Thanksgiving holiday weekend.

(Wikipedia) @YK1001

[LucioV]

We also have Black Friday in Italy... as we are importing all US traditions 😄

It's when a lot of people buy things they don't really need, with huge discount, without checking out with "thecamelizer", so the price is the same of august 😄

[YK1001]

Thank you @NareshDarji.  

I still want to know:

- Why on a Friday?

- Why on that Friday?

- Why Black?

- What is the "last major holiday"?