title: Parsing date like 1240915075
body: <p>I am learning programming and I choose Ruby as the first language to learn.</p>
  
  <p>I am parsing an XML where dates are in this form: 1240915075 1224855068</p>
  
  <p>How is this format called? How to use that value in a Date or Time object?</p>
  
  <p>Thank you!</p>