Youtube API Date Decodable

struct Youtube: Decodable {
    private enum RootKey: String, CodingKey {
        case snippet
    }
    private enum SnippetKeys: String, CodingKey {
        case date = "publishedAt"
        case title
        case description
    }
    let title: String?
    let description: String?
    let date: Date?

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: RootKey.self)
        let snippetContainer = try container.nestedContainer(keyedBy: SnippetKeys.self, forKey: .snippet)
        title = try snippetContainer.decode(String.self, forKey: .title)
        description = try snippetContainer.decode(String.self, forKey: .description)
        let dateString = try snippetContainer.decode(String.self, forKey: .date)
        let formatter = DateFormatter.mmmDDYYYY
        if let pubishedDate = formatter.date(from: dateString)  {
            date = pubishedDate
        } else {
            throw DecodingError.dataCorruptedError(forKey: SnippetKeys.date, in: snippetContainer, debugDescription: "Date Not In Proper Format")
        }
    }
}
extension DateFormatter {
    static let mmmDDYYYY: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM-dd-yyyy"
        formatter.calendar = Calendar(identifier: .iso8601)
        formatter.timeZone = TimeZone(secondsFromGMT: 0)
        formatter.locale = Locale(identifier: "en_US_POSIX")
        return formatter
    }()
}