Having just posted on the forums for the first time (Well posted on this version of the forums for the first time) I've noticed that my founded date on the forum is incorrect (May 01, 2009) when as best as I can tell it should be Antiquity
According to this post, nations created before Mid 2003 should have the founded date of Antiquity and I know my nation was founded before then (and certainly before 2009) also my Nations XML pages shows the founded date as '0'
Sometimes happens when a nation is refounded or something that the game gets itself confused and thinks the refound date is the founding date.