let currentCalendar = NSCalendar.currentCalendar()
let dateComponents = NSDateComponents()
let timeInterval = datePicker.countDownDuration
let SecondsPerDay = 24 * 60 * 60
dateComponents.second = 3 * SecondsPerDay - Int(datePicker.countDownDuration) - 1
let threeDaysFromNow = currentCalendar.dateByAddingComponents(dateComponents, toDate: datePicker.minimumDate!, options: nil)
datePicker.maximumDate = threeDaysFromNow
let dateComponents = NSDateComponents()
let timeInterval = datePicker.countDownDuration
let SecondsPerDay = 24 * 60 * 60
dateComponents.second = 3 * SecondsPerDay - Int(datePicker.countDownDuration) - 1
let threeDaysFromNow = currentCalendar.dateByAddingComponents(dateComponents, toDate: datePicker.minimumDate!, options: nil)
datePicker.maximumDate = threeDaysFromNow