true,
		},
		// FWS is allowed before zone but HTAB is not handled. Obsolete timezone is handled.
		{
			"Fri, 21 Nov 1997 09:55:06           CST",
			time.Time{},
			true,
		},
		// FWS is allowed after date and a CRLF is already replaced.
		{
			"Fri, 21 Nov 1997 09:55:06           CST (no leading FWS and a trailing CRLF) \r\n",
			time.Time{},
			true,
		},

	}
	// Re-using some addrParser methods which support obsolete text, i.e. non-printable ASCII
	p := addrParser{date, nil}
	p.skipSpace()

	// RFC 5322: zone = (FWS ( "+" / "-" ) 4DIGIT) / obs-zone
	// zone length is always 5 chars unless obsolete (obs-zone)
	if ind := strings.IndexAny(p.s, "+-"); ind != -1 && len(p.s) >= ind+5 {
		date = p.s[:ind+5]
		p.s = p.s[ind+5:]
	} else {