     var dateFormatter = DateFormatter()
     dateFormatter.locale = Locale(identifier:"en_US_POSIX")
     dateFormatter.dateFormat = "MM'/'dd"
+    return dateFormatter
+}()
+
+private let gmtDateTimeFormatter: DateFormatter = {
+    let dateFormatter = DateFormatter()
+    dateFormatter.locale = Locale(identifier:"en_US_POSIX")
+    dateFormatter.timeZone = TimeZone(identifier: "GMT")
+    dateFormatter.dateFormat = "E, d MMM yyyy HH:mm:ss 'GMT'"
     return dateFormatter
 }()
 

        return railsDateFormatter.date(from: self)
    }

    public var iso8601DateTime: Date? {
        return iso8601DateTimeFormatter.date(from: self)
    }

        return railsDateTimeFormatter.string(from: self)
    }

    public var gmtDateTime: String {
        return gmtDateTimeFormatter.string(from: self)
    }

    public var iso8601DateTime: String {
        return iso8601DateTimeFormatter.string(from: self)
    }
