[tz] Help on Updating Java Time ZOne

Paul Eggert eggert at cs.ucla.edu
Mon Dec 2 19:41:38 UTC 2019

On 11/28/19 11:26 AM, Santos, Cosme wrote:

>                  What is tzcode and tzdb, should I update them to?

Please see <https://data.iana.org/time-zones/tz-link.html> for more 
about tzcode and tzdb. If your application uses routines not written in 
Java, you'll also need to update your operating system's time zone 
tables; details depend on the OS.

>                  Also, the Brazil Timezone change, 2019 we won’t have 
> it, so a friend sent me the tzdata2019c-rearguard.tar.gz (is this a good 
> file?)

That depends on your friend. You can generate your own 
tzdata2019c-rearguard.tar.gz file by following the instructions in the 
main tzdb distribution.

If your problem is purely Java-related, you might have better luck 
updating to a more-recent Java release. If you're using Oracle Java, 
suggests that you run 7u241, 8u231, 11.0.50, 13.0.1, or later.

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