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-$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.391 2005/10/15 20:12:32 neilc Exp $
+$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.392 2005/10/25 15:12:22 momjian Exp $
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Glaesemann)
</para>
<para>
- Days that contain a daylight savings time adjustment are not 24
- hours, but typically 23 or 25 hours. This change allows days
- (not fixed 24-hour periods) to be added to dates who's result
- includes a daylight savings time adjustment period. Therefore,
- while in previous releases <literal>1 day</> and <literal>24
- hours</> were interchangeable interval values, in this release
- they are treated differently, e.g.
+ Dates that contain a daylight savings time adjustment are not 24
+ hours, but typically 23 or 25 hours. This change allows numeric days
+ (not fixed 24-hour periods) to be added to dates which include
+ a daylight savings time adjustment period. Therefore, while in
+ previous releases <literal>1 day</> and <literal>24 hours</> were
+ interchangeable interval values, in this release they are treated
+ differently, e.g.
<programlisting>
'2005-05-03 00:00:00 EST' + '1 day' = '2005-05-04 00:00:00-04'
'2005-05-03 00:00:00 EST' + '24 hours' = '2005-05-04 01:00:00-04'