When were you born

This is in view of a female claiming to be 145 yrs old.
The oldest living person (a female) Jeanne Calment lived to the age of 122 yrs and 164 days. The list of 100 has 10 females in the top of order and also comprises of more number of females proving the longevity of the fairer sex beyond doubt.
Not a single Indian male or female fare in the list of 100 oldest people living or dead. Not a single Indian male or female exists in the list of ten living males or females on Earth. In the days of the Ramayana it was common to live up-to 200 yrs by consuming Amrit (a drink made out of the extract of a plant in the Himalayas) (Oh! Where is the plant gone?) at the age of around 18 yrs . Sages in the olden times who lived an ascetic life lived still longer. Indians believe they consume the best vegetarian (let us forget the argument of organic Vs manure food for some time). Lots of sages and cults make their appearance during the Kumbh mela (every few years) (smitten by ash on their foreheads and bodies) when Gods are supposed to release Amrit and yet we don’t find many living to a century in India. Or at least claims are not made. Or do we don’t have a proper record or evidence to prove the same.
I was trying to figure out if there was a method to calculate the age of a person? Many Indians who were born about 60/70 yrs ago have no records when they were born. Dates were assumed so that they could retire from government jobs, given a retirement age. I bet in to-days time too we have places in the interiors of India where these is neglected and midwives deliver kids to the joy of their families. We know that the age of a tree can be found out by counting the annular rings (Herbchronology). Is there any method for humans or animals? Unfortunately there is no method to prove the age of a person. Looking at the face of a person and his/her body language a lot of people can derive the age to an accuracy of 5 yrs. We can scientifically derive the age of a person from the degeneration of bones, muscle, skin or teeth. We have some methods of testing genes in blood or brain tissue to come to some conclusions. But nothing can find out what date you were born.