Re: BUG #13845: Incorrect week number

On Tue, Jan 5, 2016 at 11:59 AM, <kees.westerlaken@valuecare.nl> wrote:

> The following bug has been logged on the website:
>
> Bug reference:      13845
> Logged by:          Kees Westerlaken
> Email address:      kees.westerlaken@valuecare.nl
> PostgreSQL version: 9.2.10
> Operating system:   Linux
> Description:
>
> 2016 is a year where week numbers (US) differ from ISO.
>
> On 1 januari 2016 it works OK.
> select to_char(to_date('20160101', 'YYYYMMDD'), 'YYYYWW')
> produces 201601, while
> select to_char(to_date('20160101', 'YYYYMMDD'), 'YYYYIW')
> produces 201553.
>

It gets worse on HEAD:

postgres=# select to_char(to_date('20160101', 'YYYYMMDD'), 'YYYY:IW');
 to_char
---------
 2016:53
(1 row)

This is something close to 2017 already.

--
Alex