a.On Sunday, January 13, 2014, we went to our aunt's house. His birthday is September 15, 1985. September 15, 1985, is his birthday.
b.On Sunday January 13 2014 we went to our aunt's house. His birthday is September 15 1985 September 15 1985, is his birthday.
c.On Sunday, January 13 2014, we went to our aunt's house. His birthday is September 15. 1985, September 15, 1985, is his birthday.
d.On Sunday, January 13, 2014, we went to our aunt's house. His birthday is September 15, 1985. September 15, 1985, is his birthday.