usefor-article-09 February 2003
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5.1. Date
The Date-header contains the date and time that the article was
prepared by the poster ready for transmission and SHOULD express the
poster's local time. The content syntax makes use of syntax defined
in [RFC 2822], subject to the following revised definition of zone.
header =/ Date-header
Date-header = "Date" ":" SP Date-content
Date-content = date-time
zone = (( "+" / "-" ) 4DIGIT) / "UT" / "GMT"
The forms "UT" and "GMT" (indicating universal time) are to be
regarded as obsolete synonyms for "+0000". They MUST be accepted, and
passed on unchanged, by all agents, but they MUST NOT be generated as
part of new articles by posting and injecting agents. The date-time
MUST be semantically valid as required by [RFC 2822]. Although
folding white space is permitted throughout the date-time syntax, it
is RECOMMENDED that a single space be used in each place that FWS
appears (whether it is required or optional).
NOTE: A convention that is sometimes followed is to add a
comment, after the date-time, containing the time zone in
human-readable form, but many of the abbreviations commonly used
for this purpose are ambiguous. The value given by the <zone> is
the only definitive form.
In order to prevent the reinjection of expired articles into the news
stream, relaying and serving agents MUST refuse "stale" articles
whose Date-header predates the earliest articles of which they
normally keep record, or which is more than 24 hours into the future
(though they MAY use a margin less than that 24 hours). Relaying
agents MUST NOT modify the Date-header in transit.
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#Diff to first older
--- ../usefor-article-08/Date.out August 2002
+++ ../usefor-article-09/Date.out February 2003
@@ -7,18 +7,17 @@
header =/ Date-header
Date-header = "Date" ":" SP Date-content
- *( ";" other-parameter )
Date-content = date-time
zone = (( "+" / "-" ) 4DIGIT) / "UT" / "GMT"
The forms "UT" and "GMT" (indicating universal time) are to be
- regarded as obsolete synonyms for "+0000". They MUST be be accepted,
- and passed on unchanged, by all agents, but they MUST NOT be
- generated as part of new articles by posting and injecting agents.
- The date-time MUST be semantically valid as required by [RFC 2822].
- Although folding white space is permitted throughout the date-time
- syntax, it is RECOMMENDED that a single space be used in each place
- that FWS appears (whether it is required or optional).
+ regarded as obsolete synonyms for "+0000". They MUST be accepted, and
+ passed on unchanged, by all agents, but they MUST NOT be generated as
+ part of new articles by posting and injecting agents. The date-time
+ MUST be semantically valid as required by [RFC 2822]. Although
+ folding white space is permitted throughout the date-time syntax, it
+ is RECOMMENDED that a single space be used in each place that FWS
+ appears (whether it is required or optional).
NOTE: A convention that is sometimes followed is to add a
comment, after the date-time, containing the time zone in