Cyber Monday refers to the Monday after Thanksgiving in the U.S., which is marked by special holiday promotions by online retailers, originally in response to the success of Black Friday. 
The term was coined by Ellen Davis of the National Retail Federation and Scott Silverman, debuting Nov. 28, 2005, in a Shop.org press release entitled, “‘Cyber Monday’ Quickly Becoming One of the Biggest Online Shopping Days of the Year.” 
In 2006, CNN Money noted that in-store shortages of popular toys and gaming consoles were making online Cyber Monday shopping more attractive to holiday shoppers. 
- Common Language in Marketing Project, 2016.
- Wikipedia, “Cyber Monday.”
- CNN Money, “For e-tailers, it’s Cyber Monday,” Parija B. Kavilanz, Nov. 27, 2006.