Black Friday is the day after Thanksgiving and the traditional start of the holiday shopping season, with big sales in stores and online. It is not a federal holiday, but many employers give the day off.
No. Black Friday is not a federal holiday in the US, so government offices, banks and schools follow their normal schedule unless they choose otherwise.
Why does the date of Black Friday change each year?
It is set by a rule rather than a fixed date: the day after Thanksgiving. The day of the month moves each year to keep that weekday.