Wrapped time xml marshal

const longform string = "2006-01-02T15:04:00"

type WrapTime struct{
  time.Time
}

func (t WrapTime) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
        fmted := t.Format(longform)
        err := e.EncodeElement(fmted, start)
        if err != nil {
                return err 
        }   
        return nil 
}
func (t *WrapTime) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
        var v string
        d.DecodeElement(&v, &start)
        parse, err := time.Parse(longform, v)
        if err != nil {
                return err 
        }   
        *t = WrapTime{parse}
        return nil 
}