@@ -1932,19 +1932,27 @@ MINUTE TO SECOND
19321932 </row>
19331933 <row>
19341934 <entry><literal>04:05:06.789-8</literal></entry>
1935- <entry>ISO 8601</entry>
1935+ <entry>ISO 8601, with time zone as UTC offset </entry>
19361936 </row>
19371937 <row>
19381938 <entry><literal>04:05:06-08:00</literal></entry>
1939- <entry>ISO 8601</entry>
1939+ <entry>ISO 8601, with time zone as UTC offset </entry>
19401940 </row>
19411941 <row>
19421942 <entry><literal>04:05-08:00</literal></entry>
1943- <entry>ISO 8601</entry>
1943+ <entry>ISO 8601, with time zone as UTC offset </entry>
19441944 </row>
19451945 <row>
19461946 <entry><literal>040506-08</literal></entry>
1947- <entry>ISO 8601</entry>
1947+ <entry>ISO 8601, with time zone as UTC offset</entry>
1948+ </row>
1949+ <row>
1950+ <entry><literal>040506+0730</literal></entry>
1951+ <entry>ISO 8601, with fractional-hour time zone as UTC offset</entry>
1952+ </row>
1953+ <row>
1954+ <entry><literal>040506+07:30:00</literal></entry>
1955+ <entry>UTC offset specified to seconds (not allowed in ISO 8601)</entry>
19481956 </row>
19491957 <row>
19501958 <entry><literal>04:05:06 PST</literal></entry>
@@ -1980,25 +1988,29 @@ MINUTE TO SECOND
19801988 <entry><literal>PST8PDT</literal></entry>
19811989 <entry>POSIX-style time zone specification</entry>
19821990 </row>
1991+ <row>
1992+ <entry><literal>-8:00:00</literal></entry>
1993+ <entry>UTC offset for PST</entry>
1994+ </row>
19831995 <row>
19841996 <entry><literal>-8:00</literal></entry>
1985- <entry>ISO-8601 offset for PST</entry>
1997+ <entry>UTC offset for PST (ISO 8601 extended format) </entry>
19861998 </row>
19871999 <row>
19882000 <entry><literal>-800</literal></entry>
1989- <entry>ISO-8601 offset for PST</entry>
2001+ <entry>UTC offset for PST (ISO 8601 basic format) </entry>
19902002 </row>
19912003 <row>
19922004 <entry><literal>-8</literal></entry>
1993- <entry>ISO-8601 offset for PST</entry>
2005+ <entry>UTC offset for PST (ISO 8601 basic format) </entry>
19942006 </row>
19952007 <row>
19962008 <entry><literal>zulu</literal></entry>
19972009 <entry>Military abbreviation for UTC</entry>
19982010 </row>
19992011 <row>
20002012 <entry><literal>z</literal></entry>
2001- <entry>Short form of <literal>zulu</literal></entry>
2013+ <entry>Short form of <literal>zulu</literal> (also in ISO 8601) </entry>
20022014 </row>
20032015 </tbody>
20042016 </tgroup>
@@ -2336,6 +2348,24 @@ January 8 04:05:06 1999 PST
23362348 </tgroup>
23372349 </table>
23382350
2351+ <para>
2352+ In the <acronym>ISO</acronym> style, the time zone is always shown as
2353+ a signed numeric offset from UTC, with positive sign used for zones
2354+ east of Greenwich. The offset will be shown
2355+ as <replaceable>hh</replaceable> (hours only) if it is an integral
2356+ number of hours, else
2357+ as <replaceable>hh</replaceable>:<replaceable>mm</replaceable> if it
2358+ is an integral number of minutes, else as
2359+ <replaceable>hh</replaceable>:<replaceable>mm</replaceable>:<replaceable>ss</replaceable>.
2360+ (The third case is not possible with any modern time zone standard,
2361+ but it can appear when working with timestamps that predate the
2362+ adoption of standardized time zones.)
2363+ In the other date styles, the time zone is shown as an alphabetic
2364+ abbreviation if one is in common use in the current zone. Otherwise
2365+ it appears as a signed numeric offset in ISO 8601 basic format
2366+ (<replaceable>hh</replaceable> or <replaceable>hhmm</replaceable>).
2367+ </para>
2368+
23392369 <para>
23402370 The date/time style can be selected by the user using the
23412371 <command>SET datestyle</command> command, the <xref