Date Formatting

dateFormat.js

function pluralize(dur, s) {
  var ret = false;
  
  if (dur > 0) {
    ret = dur + ' ' + s;

    if (dur > 1) {
      ret += 's';
    }
  }

  return ret;
}

function formatDuration(seconds) {
  var segments = [];
  
  var years  = Math.floor(seconds / 31556952)
    , sYears = pluralize(years, 'year')
    ;

  if (sYears) { 
    segments.push(sYears); 
  }

  var days = Math.floor((seconds % 31556952) / 86400)
    , sDays = pluralize(days, 'day')
    ;

  if (sDays) {
    segments.push(sDays);
  }
  
  var hours = Math.floor(((seconds % 31556952) % 86400) / 3600)
    , sHours = pluralize(hours, 'hour')
    ;

  if (sHours) {
    segments.push(sHours);
  }
  
  var minutes = Math.floor((((seconds % 31556952) % 86400) % 3600) / 60)
    , sMinutes = pluralize(minutes, 'minute')
    ;

  if (sMinutes) {
    segments.push(sMinutes);
  }
  
  var seconds = (((seconds % 31556952) % 86400) % 3600) % 60
    , sSeconds = pluralize(seconds, 'second')
    ;

  var tmp = segments.join(', ');
  if (!sSeconds) {
    return tmp;
  }
  
  return tmp + ' and ' + sSeconds;
}