A day of celebration that occurs each year on day 267 of the standard galactic calendar, Fexian`ydd memorializes the scouting of the Hermos system and subsequent signing of the Talarian Agreement. An event that expanded the galactically recognized Greater Tion even further. The Hermos system was officially admitted to the Hegemony on day 281, a mere fourteen days after contact with the locals was made.   

Fexian`ydd is an ancient Tionese word meaning 'discovery day'.