Calculate date of birth from age at specific date [MySQL or Perl] -

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apologies if simple question interested in trying reach accurate answer , not "rounded" answer.

my problem is: know 27.12 on 18th of march 2008 (random example). how can calculate, nearest approximation, date of birth. age provided real number 2 decimal points.

eumiro's answer trick; following, using time::piece module (bundled perl since 5.10) perhaps more maintainable.

use strict; use warnings; use 5.010;  use time::piece; use time::seconds;  ($date, $age) = ('2008-03-18', 27.12);  $birthday = time::piece->strptime($date, '%y-%m-%d') - $age*one_year; $birthday->ymd();

this within few days of actual birthday, due lack of accuracy (1/100 year) in age.


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