https://www.nativeskywatchers.com/
Excerp from Native American Heritage Day wiki page: In addition to calling Thanksgiving the “National Day of Mourning,” some Native Americans believe it is “poor taste” for Native American Heritage Day to be on Black Friday – “a day of excess and gluttony and greed and aggressive capitalism” – which itself “falls after a holiday that omits the murder and mutilation of Natives [in which they] mourn the [estimated] millions of indigenous people who died as a result of aggressive settler colonialism.”