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30th September 1950 was a Saturday.
September 30th 1990 was a Sunday.
30th September 1946 was a Monday.
September 30th, 1012 fell on a Wednesday.
September 30th 1958 was a Tuesday.
September 30th, 1989 fell on a Saturday.
September 30th, 2002 fell on a Monday.
September 30th 2013 is going to fall on a Monday.
May 30th, 1950 was a Thursday.
It depends if 30th September was actually your due date. I will assume that you are talking about September 30th 2010. Assuming that September 30th was your due date, it makes your conception date roughly January 6th 2010. This date might be a couple of days out.
On the 30th of September
On the 30th of September 2012.