Satoshi announced the existence of the bitcoin network and the availability of his software on the day he started it, on a cryptography mailing list. The first block is dated from january 3rd, 2009. In order to determine its hash, the first block uses a newspaper title from that same day, which proves that the date was not faked.

now, I am astonished that you ask me how I know this, and that you do not ask the same question to those who make the opposite claim.
why ?