Considering the fact that DST is a political function of time, I would be
hesitant to attach too much confidence in any future DST, particularly the
more you go into the future.
On Thu, Sep 6, 2012 at 5:36 AM, Zubin Kavarana <zubinkavar...@inbox.com>wrote:
> **
> For a certain timezone (Tehran), DST transitions do not continue past the
> year 2037, which is the last year in the tzdata for which this zone has DST
> information. Are DST transitions supposed to continue as a simple rule
> following the last year rule, or stop completely if there is no data?
>
> I noticed the following -
>
> 1. Where tzdata has DST rules like 1996 to max (EU), the DST continues
> indefinitely (or at least to 100 years after compiling)
> 2. A comment in the class "org.joda.time.tz.DateTimeZoneBuilder",
> method "toDateTimeZone(String id, boolean outputID)" reads "// Tail zone
> picks up remaining transitions in the form of an endless DST cycle." The
> tailzone for the kind of zone without max given results in null (due to max
> not being specified in the tzdata)
> 3. A tailzone is built in the method "public DSTZone
> buildTailZone(String id)" in the class
> "org.joda.time.tz.DateTimeZoneBuilder", but it will only do so if the rules
> start year and end year are equal to max int value, else it returns null
> 4. JDKs (JRockit, HotSpot and IBM J9) seem to apply the last rule in
> 2037 further onwards for subsequent years
>
> To summarize - I am not sure if (not) applying DST transitions past the
> last year specified in tzdata, where max is not given, is a bug or a design
> decision?
>
> ------------------------------
> [image: Try IM ToolPack] <http://www.imtoolpack.com/default.aspx?rc=if3>
> *Send your photos by email in seconds...*
> *Try FREE IM ToolPack* at
> www.imtoolpack.com<http://www.imtoolpack.com/default.aspx?rc=if3>
> Works in all emails, instant messengers, blogs, forums and social networks.
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Joda-interest mailing list
> Joda-interest@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/joda-interest
>
>
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Joda-interest mailing list
Joda-interest@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/joda-interest
