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https://issues.apache.org/jira/browse/LOG4J2-1246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16695478#comment-16695478
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Gary Gregory commented on LOG4J2-1246:
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OK, so {{yyyy-MM-dd'T'HH:mm:ss,SSSZ}} gives me, for example,
{{2018-11-21T19:06:57,974-0700}} but shouldn't I be able to say {{%d\{Z}}} or
something like it?
> PatternLayout %date conversion pattern should render time zone designator for
> ISO-ISO8601
> -----------------------------------------------------------------------------------------
>
> Key: LOG4J2-1246
> URL: https://issues.apache.org/jira/browse/LOG4J2-1246
> Project: Log4j 2
> Issue Type: Bug
> Components: Pattern Converters
> Affects Versions: 2.4.1, 2.5
> Reporter: Daniel Marcotte
> Priority: Major
>
> Hi there!
> There might be a small issue with the Pattern Converters regarding Timezone
> management:
> http://logging.apache.org/log4j/2.x/manual/layouts.html#PatternLayout
> Right now, these patterns:
> * {{"%d\{ISO8601_BASIC\}}}
> * {{%d\{ISO8601_BASIC\}\{UTC\}}}
> Give the same results:
> * {{20160104T204256,048}}
> * {{20160104T204256,048}}
> However, with a deeper look at the ISO-8601 standards, the second one with
> {{"\{UTC\}"}} should properly add the Timezone at the end of the timestamp.
> Reference: https://en.wikipedia.org/wiki/ISO_8601#Times
> {quote}
> *UTC*
> If the time is in UTC, add a Z directly after the time without a space. Z is
> the zone designator for the zero UTC offset. "09:30 UTC" is therefore
> represented as "09:30Z" or "0930Z". "14:45:15 UTC" would be "14:45:15Z" or
> "144515Z".
> UTC time is also known as 'Zulu' time, since 'Zulu' is the NATO phonetic
> alphabet word for 'Z'.
> *Examples*
> <time>Z
> <time>±hh:mm
> <time>±hhmm
> <time>±hh
> {quote}
> As of ISO-8601, the results should be one of the following (configurable?):
> * {{20160104T204256,048Z}}
> * {{20160104T204256,048+00:00}}
> * {{20160104T204256,048+0000}}
> * {{20160104T204256,048+00}}
> Another reference:
> http://stackoverflow.com/questions/833102/wheres-the-datetime-z-format-specifier
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