Noun
age measured by the time (years and months) that something or someone has existed
Source: WordNetI like a boyish quality in a man, somebody who is still adventurous. But I have no rules. I do not care - within reason - about your chronological age. I care whether you have passion in your life. Mary Frann
Youth hasn't got anything to do with chronological age. It's times of hope and happiness. Wallace Stegner
Thomas Jefferson made a comment about the Presidency and age. He said that one should not worry about one's exact chronological age in reference to his ability to perform one's task. And ever since he told me that, I stopped worrying. Ronald Reagan
his chronological age was 71 years Source: Internet