In the United States, "Black Friday" follows Thanksgiving, and is considered the biggest moneymaking day of the year for retailers. Traditional paper leger numbers are recorded in black ink for income, as opposed to red ink for losses. 黑色星期五 holiday sales、in the black、marketing、moneymaking、sale 假日銷售、在黑色、營銷、賺錢、拍賣 資料來源:openclipart ( https://openclipart.org/ )