title: Swift - Weekday by current location by currentCalendar()
body: <p>Today is Wednesday and I have this code</p>
  
  <pre><code>let calendar:NSCalendar = NSCalendar.currentCalendar()
  let dateComps:NSDateComponents = calendar.components(.CalendarUnitWeekday , fromDate: NSDate())
  let dayOfWeek:Int = dateComps.weekday
  </code></pre>
  
  <p>dayOfWeek is 4, but today is 3rd day of the week in Bulgaria.
  Is in USA today is 4th day of the week? And how to determine when the week starts in different countries and regions ?
  On my iPhone locale and calendar are set to Bulgarian calendar and locale and it knows that the week starts on Monday on my iMac also, but when I execute code it writes me 4...</p>