Based on a normal gestation period of 40 weeks the conception date was April 13th, of the previous year.
You probably conceived between January 7th and January 15th
Roughly April 11th
April to early may.
Probably around January 14.
Your sentence structure is flawed.
May 2009
~5 January, give or take.
January 21st.
round about the 2nd may 2010
On or around the 6th of April.
Around the 29th of january
Roughly Sunday May 4th 2008, although it depends mainly on your due date rather than on when you baby was actually born