Re: here does postgres take its timezone information from?

On 05/11/2019 22:54, Adrian Klaver wrote:
> On 11/5/19 2:46 PM, Chris Withers wrote:
>> Hi All,
>>
>> Brazil recently abolished daylight savings time, resulting in updates 
>> to system timezone information packages.
>> Does postgres use these? If so, does it need a reload or restart to 
>> see the updated zone info?
>>
>> If not, how does postgres store/obtain its timezone zone information 
>> and how would this be updated?
> 
> https://www.postgresql.org/about/news/1960/
> PostgreSQL 11.5, 10.10, 9.6.15, 9.5.19, 9.4.24, and 12 Beta 3 Released!
> 
> "This update also contains tzdata release 2019b for DST law changes in 
> Brazil, plus historical corrections for Hong Kong, Italy, and Palestine. 
> This update also adds support for zic's new -b slim option to reduce the 
> size of the installed zone files, though it is not currently being used 
> by PostgreSQL."

Hmm. Is there any option to use the system timezone packages?

If not, why not?

Chris