Black Friday and Cyber Monday

I have always been wondering what Black Friday was all about. I initially thought that this is the Friday during the Holy week. But when I checked it's actually the Friday after Thanksgiving when there's a countrywide sale in the US and other countries.

Then came Cyber Monday. This is now a worldwide sale online the Monday after Thanksgiving Day. Hmm.. so much of sale going on huh.. But I'm already contented buying some stuff from the 'after flood' sale in Hat Yai.