Black Friday remains one of the busiest shopping days of the year, but its impact has been diluted by monthlong holiday sales and the convenience of buying online. E-Commerce, Thanksgiving Day, Black Friday and Cyber Monday (Shopping), Shopping and Retail, Inflation (Economics), Discount Selling, Electronics, Consumer Behavior Black Friday remains one of the busiest shopping days of the year, but its impact has been diluted by monthlong holiday sales and the convenience of buying online. NYT > Business