init(calendar: Calendar?, timeZone : TimeZone?, era: Int?, year: Int?, month: Int?, day: Int?, hour: Int?, minute: Int?, second: Int?, nanosecond: Int?, weekday: Int?, weekdayOrdinal : Int?, quarter: Int?, weekOfMonth : Int?, weekOfYear : Int?, yearForWeekOfYear : Int?)
Initializes a date components value, optionally specifying values for its fields.
日付構成要素値を初期化します、随意にそれの各情報単位欄に対して値を指定します。
var timeZone : TimeZone?
A time zone.
あるタイムゾーン。