From 7cb99b269667ef3d8869bc9f7681debc12c45b1d Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Mon, 5 Sep 2011 15:37:58 -0400
Subject: [PATCH] Add mention that UTC really means UT1.
Backpatch to 9.1.
---
doc/src/sgml/catalogs.sgml | 4 +++-
doc/src/sgml/func.sgml | 4 +++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index 6d5dad369d7..d6baf84248e 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -8341,7 +8341,9 @@
The view <structname>pg_timezone_names</structname> provides a list
of time zone names that are recognized by <command>SET TIMEZONE</>,
along with their associated abbreviations, UTC offsets,
- and daylight-savings status.
+ and daylight-savings status. (Technically,
+ <productname>PostgreSQL</productname> uses <acronym>UT1</> rather
+ than UTC because leap seconds are not handled.)
Unlike the abbreviations shown in <link
linkend="view-pg-timezone-abbrevs"><structname>pg_timezone_abbrevs</structname></link>, many of these names imply a set of daylight-savings transition
date rules. Therefore, the associated information changes across local DST
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 4c3e232838c..c03dd6c8a3e 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -6898,7 +6898,9 @@ SELECT EXTRACT(SECOND FROM TIME '17:12:28.5');
<para>
The time zone offset from UTC, measured in seconds. Positive values
correspond to time zones east of UTC, negative values to
- zones west of UTC.
+ zones west of UTC. (Technically,
+ <productname>PostgreSQL</productname> uses <acronym>UT1</> because
+ leap seconds are not handled.)
</para>
</listitem>
</varlistentry>
--
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