RFC 3339 date string in Swift

gistfile1.swift

        var now = NSDate()
        var localTimeZone = NSTimeZone.systemTimeZone()
        var rfc3339DateFormatter = NSDateFormatter(format: "yyyy'-'MM'-'dd'T'HH':'mm':'ssZ")
        rfc3339DateFormatter.locale = NSLocale( localeIdentifier: "en_US_POSIX")
        rfc3339DateFormatter.timeZone = localTimeZone
        
        var dateString = rfc3339DateFormatter.stringFromDate(now)
        
        NSLog("RFC 3339 datetime: \(dateString)")
        
        
        //reference: https://gist.github.com/popthestack/5877965

See also:

• https://developer.apple.com/documentation/foundation/date/3766420-iso8601format
• https://sarunw.com/posts/how-to-parse-iso8601-date-in-swift/#caveats
• https://stackoverflow.com/questions/28016578/how-can-i-parse-create-a-date-time-stamp-formatted-with-fractional-seconds-utc