There was a question on SO on how to calculate someones current age in years. It's a simple enough operation using Joda-time (http://joda.sourceforge.net/). I thought I'd turn my example into a gist, if anyone else is interested. It's easy to turn this into something that would calculate the age in days or months or whatever... Please tell me if…

YearDiff.groovy

import org.joda.time.DateTime
import org.joda.time.Years

def calculateAgeInYears(int year, int monthOfYear, int dayOfMonth) {
  def yob = new DateTime(year, monthOfYear, dayOfMonth, 0, 0).toDateMidnight()
  def now = DateTime.now().toDateMidnight()
  return Years.yearsBetween(yob, now).getYears()
}

def years = calculateAgeInYears(1983, 12, 10)
println "Years: $years"