Aug. 18, 2008
The domain name bitcoin.org is registered. Today, at least, this domain is "WhoisGuard Protected," meaning the identity of the person who registered it is not public information.
Oct. 31, 2008
A person or group using the name Satoshi Nakamoto makes an announcement on the Cryptography Mailing list at metzdowd.com: "I've been working on a new electronic cash system that's fully peer-to-peer, with no trusted third party. This now-famous whitepaper published on bitcoin.org, entitled "Bitcoin: A Peer-to-Peer Electronic Cash System," would become the Magna Carta for how Bitcoin operates today.
Jan. 3, 2009
The first Bitcoin block is mined, Block 0. This is also known as the "genesis block" and contains the text: "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks," perhaps as proof that the block was mined on or after that date, and perhaps also as relevant political commentary.6
Jan. 8, 2009
The first version of the bitcoin software is announced on the Cryptography Mailing list.
Jan. 9, 2009
Block 1 is mined, and bitcoin mining commences in earnest.