func (t Time) appendFormatRFC3339(b []byte, nanos bool) []byte { … } func (t Time) appendStrictRFC3339(b []byte) ([]byte, error) { … } func parseRFC3339[bytes []byte | string](s bytes, local *Location) (Time, bool) { … } func parseStrictRFC3339(b []byte) (Time, error) { … }