BFCM is an acronym for Black Friday/Cyber Monday -- which are big yearly marketing days that come the Friday after Thanksgiving (which by law is always celebrated on the fourth Thursday in November), and the next Monday. There are usually big discounts on items, to entice shoppers and kick off the frenzied American Christmas shopping season. It is typically the biggest shopping day of the year.
Celebrating 25 Years of Creating an Island of Stability In the Sea of Online Confusion