I really think it should be called something else… but I think the Internet has decided on naming it as such.
I heard about it two days ago, when I saw in my feeds something about Calendar About Nothing. It seems like this concept was borne and named after this post on Lifehacker.
What am I talking about? It’s a simple concept: Just keep the streak of “X”s going. Don’t break the chain.
Looks like there’s a Don’t Break The Chain! webapp that is a bit more generalized. Of course, I’d go a bit further and start creating multiple calendars per user, sell it as an iPhone app, blah blah blah…
But really, this is quite an elegant way to get some stuff done every day. Good way to keep track of the things that you’ve done also.
Second Google search is for this page, where the author has generated two pdf versions of this calendar for easy printing.