SEPTA does not mean nine, but rather is the latin word for seven. September was originally the seventh month on the Roman calendar which began in March instead of January.
Thus September is the ninth month but is named after the seventh. A similar thing occures with October, November, and December. The 8th, 9th and 10th months, respectively.
Claang the Origin - 2005 was released on: USA: 2 September 2005 (DragonCon Film Festival)
The Origin of the World - 2008 was released on: USA: 12 September 2008 (Sydney Underground Film Festival)
Silverhawks - 1986 The Origin Story 1-1 was released on: USA: 8 September 1986
Mexican Independence Day is 16 September and independence from Spain came in 1810.
Somethin' Suave' Theater - 2009 Origin 1-1 was released on: USA: 18 September 2009
Earthworm Jim - 1995 The Origin of Peter Puppy 2-1 was released on: USA: 7 September 1996
ER - 1994 Fevers of Unknown Origin - 2.20 was released on: USA: 2 May 1996 Japan: 1 September 1997
Creation Today - 2011 The Origin of Life Part 1 3-9 was released on: USA: 13 September 2013
Spider-Man and His Amazing Friends - 1981 The Origin of Iceman 2-1 was released on: USA: 18 September 1982
Creation Today - 2011 The Origin of Life Part 2 3-10 was released on: USA: 20 September 2013
Angel - 1999 Origin 5-18 was released on: USA: 21 April 2004 Germany: 11 August 2008 Hungary: 26 September 2008
ER - 1994 Fevers of Unknown Origin 2-20 was released on: USA: 2 May 1996 Japan: 1 September 1997