On February 9, 1998, I published the Open Source Definition and the public announcement of the Open Source Initiative that Eric Raymond and I were starting. This was the first time that the general public heard what Open Source was about. Friday, February 8 is the last day of Decade Zero of Open Source. Saturday, February 9 is the anniversary of Open Source and the start of Decade One. It's a computer scientist thing. We always start counting from zero :-)