calendar
The calendar to use for the date picker.
Declaration
var calendar: Calendar! { get set }Discussion
The default value of this property corresponds to the user’s current calendar as configured in Settings. This is equivalent to the value returned by calling the NSCalendar class method current. Setting this property to nil is equivalent to setting it to its default value.
Calendars specify the details of cultural systems used for reckoning time; they identify the beginning, length, and divisions of a year.