The DatePicker uses the provided [`Calendar`](https://developer.apple.com/documentation/foundation/calendar) instance as a data source. If no calendar is provided, it uses [`Calendar.current`](https://developer.apple.com/documentation/foundation/calendar/2293438-current), which is the system calendar. ### Default configuration ```Swift // Default configuration with date-only text field DatePickerController(date: nil, calendar: nil, style: .date) ```

### DatePicker with time text field ```Swift // Default configuration with date and time text field DatePickerController(date: nil, calendar: nil, style: .dateTime) ```

### Custom initial date ```Swift // Custom initial date let date = Calendar.current.date(from: DateComponents(year: 2019, month: 1, day: 1)) DatePickerController(date: date, calendar: nil, style: .date) ```

### Custom calendar ```Swift // Custom calendar var calendar = Calendar(identifier: .islamic) calendar.locale = Locale(identifier: "ar") DatePickerController(date: nil, calendar: calendar, style: .date) ```

### Secondary calendar ```Swift // Secondary Calendar var calendar = Calendar.init(identifier: .chinese) calendar.locale = Locale(identifier: "zh") let controller = DatePickerController(date: nil, calendar: nil, style: .date) controller.secondaryCalendar = calendar ```

### No text field ```Swift // No text field let controller = DatePickerController(date: nil, calendar: nil, style: .date) controller.hasTextField = false ```