title: Convert currentCalendar() Date to NSCalendarIdentifierChinese
body: <p>I have written the function to get the 1st day of the year on the Chinese calendar for the past 100 years. Some of the values which are returned from the loop are correct. i have verified the Chinese new year dates with this link <a href="http://www.fengshuimiracle.com/154/how-work-out-your-animal-sign-and-chinese-year" rel="nofollow">http://www.fengshuimiracle.com/154/how-work-out-your-animal-sign-and-chinese-year</a>
  . is there a lunar calendar which can be referenced or am i missing something in my code.</p>
  
  <pre><code> override func viewDidLoad() {
      super.viewDidLoad()
      // Do any additional setup after loading the view, typically from a nib.
             loopthrough()
  
  }
  
  func returnDateForMonth(month:NSInteger, year:NSInteger, day:NSInteger)-&gt;NSDate{
      let comp = NSDateComponents()
      comp.month = month
      comp.year = year
      comp.day = day
  
      let chCal = NSCalendar(calendarIdentifier: NSCalendarIdentifierChinese)
      return chCal!.dateFromComponents(comp)!
  }
  
  func showDate(getDate:NSDate)-&gt;String{
      let date = getDate
      //let calendar = NSCalendar.currentCalendar()
      let calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierChinese)
      let dateComponents = calendar!.components([NSCalendarUnit.Year], fromDate: date)
      let firstDay = returnDateForMonth(dateComponents.month, year: dateComponents.year, day: 1)
      let dateFormatter = NSDateFormatter()
      dateFormatter.dateFormat = "dd-MMM-yy"
      let formattedDate = dateFormatter.stringFromDate(firstDay)
      //print("First day of this month: \(formattedDate)") // 01-Sep-15
      print(formattedDate)
      return formattedDate
  }
  
  
  
  func substractyear(getI:Int)-&gt;String{
  
      let getInt = getI * -1
      let components: NSDateComponents = NSDateComponents()
      components.setValue(getInt, forComponent: NSCalendarUnit.Year);
      let date: NSDate = NSDate()
      let expirationDate = NSCalendar.currentCalendar().dateByAddingComponents(components, toDate: date, options:NSCalendarOptions(rawValue: 0))
  
      return showDate(expirationDate!)
  
  }
  
  
  func loopthrough(){
  
      for var i = 1; i &lt; 100; i++ {
          //print("\(i)")
          substractyear(i)
  
      }
  
  }
  </code></pre>
  
  <p>output</p>
  
  <p>31-Jan-14
  10-Feb-13
  23-Jan-12
  03-Feb-11
  14-Feb-10
  26-Jan-09
  07-Feb-08
  18-Feb-07
  29-Jan-06
  09-Feb-05
  22-Jan-04
  01-Feb-03
  12-Feb-02
  24-Jan-01
  05-Feb-00
  16-Feb-99
  28-Jan-98
  07-Feb-97
  19-Feb-96
  31-Jan-95
  10-Feb-94
  23-Jan-93
  04-Feb-92
  15-Feb-91
  27-Jan-90
  06-Feb-89
  17-Feb-88
  29-Jan-87
  09-Feb-86
  20-Feb-85
  02-Feb-84
  10-Feb-43
  22-Jan-42
  01-Feb-41
  12-Feb-40
  24-Jan-39
  04-Feb-38
  15-Feb-37
  28-Jan-36
  08-Feb-35
  19-Feb-34
  31-Jan-33
  11-Feb-32
  23-Jan-31
  03-Feb-30
  13-Feb-29
  26-Jan-28
  06-Feb-27
  17-Feb-26
  29-Jan-25
  10-Feb-24
  22-Jan-23
  01-Feb-22
  12-Feb-21
  25-Jan-20
  05-Feb-19
  16-Feb-18
  28-Jan-17
  08-Feb-16
  19-Feb-15
  31-Jan-14
  10-Feb-13
  23-Jan-12
  03-Feb-11
  14-Feb-10
  26-Jan-09
  07-Feb-08
  18-Feb-07
  29-Jan-06
  09-Feb-05
  22-Jan-04
  01-Feb-03
  12-Feb-02
  24-Jan-01
  05-Feb-00
  16-Feb-99
  28-Jan-98
  07-Feb-97
  19-Feb-96
  31-Jan-95
  10-Feb-94
  23-Jan-93
  04-Feb-92
  15-Feb-91
  27-Jan-90
  06-Feb-89
  17-Feb-88
  29-Jan-87
  09-Feb-86
  20-Feb-85
  02-Feb-84
  10-Feb-43
  22-Jan-42
  01-Feb-41
  12-Feb-40
  24-Jan-39
  04-Feb-38
  15-Feb-37
  28-Jan-36</p>