sir i would say thats the time time got to know. or we can say plus minus 5 mins thats all i can say!OK another question(hopefully a little less off the wall).
You have given a 6:30 birth time. Almost no one is born exactly on the hour or the half hour. In 99% of cases this is a rounded number because the birthing people were too busy to think about a time, and you were too busy learning how to just breath to look at a clock, even if you even knew what a clock was, since you didn't.
See if someone who was there at the time, like your mom, might have a better time. For most things the difference in not great but when you are talking about things that have to do with cognitive functioning it can be significant.