actual birthday

It was Thursday, September 3rd, 2021, while I was in bed I was thinking what was my actual age.  I went to a website telling me my age.  That did not help me.  I was thinking about what would be my actual age.  If a couple found out that she was pregnant, it would take 9 months to deliver a baby.  So doing that calculation, I was born on March 30, 1980.  If I was in mommy's uterus for 9 months.   I was 9/12 in mommy's womb, so my actual age was 41.75.