title: Converting Unix timestamp to hours
body: <p>All,</p>
  
  <p>I have a database field which actually computes the time spent from the time the quiz started to the current time. This was done at some point of time (recorded as current time) and now I have an Unixtimestamp value for it </p>
  
  <p>i.e. Suppose the start time was 5/5/2011 1pm and the current time was populated at 5/5/2011 2pm. So the difference is calculated and stored as an Unix timestamp. </p>
  
  <p>Now I don't know when this was actually done and now I have to revert back to hours spent taking the quiz. So here a Unix timestamp needs to be converted back to hours, in this case return 1 hour. Can anyone please help me understand how to do this?</p>