Cyber Monday is a marketing term for the Monday after Thanksgiving in the United States. The term « Cyber Monday » was created by marketing companies to persuade people to shop online. The term made its debut on November 28, 2005 in a Shop.org press release entitled « ‘Cyber Monday Quickly Becoming One of the Biggest Online Shopping Days of the Year ».
On wikipedia: http://en.wikipedia.org/wiki/Cyber_Monday