Birth date

Two nights ago I was filling out immigration paperwork for Yosef and I had to get his passport number.  As I was looking at that I noticed his birth date which was listed as August 17.  That was confusing since our original paperwork told us it was August 15.  I clarified with our agency who sent me his birth certificate which also reads August 17.  Apparently our agency had made a typo.  So for clarification purposes because I know I've told a bunch of you that it is the 15th, I stand corrected.  We shall celebrate the 17th!!