According to AdBusters it is Buy Nothing Day on either 28th Nov (US) or 29th Nov (Int'l).
Perhaps after the GFC (Global Financial Crisis) outbreak it is time to think about how we spend and what we spend it on? Worth thinking about at least ...
UPDATE: Thanks to Anonymous who posted a link to some YouTube videos about Buy Nothing Day - there's some good ones there
By Carruthers via Aide-mémoire