Revised my age from 1991 to 1994 for a competition

The story

This is my second time revising my age... First time I did it was I was turning 26 and I wanted to join a certain competition with the age limit of 24! So I revised my age to 23... I kept telling myself that I was born in 1994, even my birthday certificate shows I was born in 1994, and that no body not even my own mother remember my old age... Here comes the interesting part.. 2weeks before the registration deadline my birthday certificate went missing and I always had it with me... But it disappeared completely, and I couldn't find it so I asked my dad if it was possible to make another for me, since my information was already in the system so it was going to be easy to make a new one so I could finalize my registration... Here comes an interesting part when my new certificate came it said I was born on June 7, 1994.. when in actuality I was born in 1991, I asked my father why is it saying I was born in 1994... He looked at me surprised and told me it's because that's when I was born