It's a very funny cultural phenomenon that Hungarian shops do "10% off!" and call it #BlackFriday We don't even have Thanksgiving...
@TarkabarkaHolgy Fake sales here in last few years called Black Friday.
US commercial cultural imperialism.
Thanksgiving is practically a 19th C invention in USA made in to an official holiday later to promote shopping:
President Franklin D. Roosevelt moved it 1 week earlier, observed between 1939 and 1941 amid significant controversy. A 1942 act of Congress made Thanksgiving the 4th Thursday in November.
Hardly existed before 18th.
Lots of Myth.