Re: BUG #1217: wrong date->number of week conversion

This look like it would be nice to have it configurable.

first_day_of_the_week
first_day_of the_year

Tom Lane wrote:

> "PostgreSQL Bugs List" <pgsql-bugs(at)postgresql(dot)org> writes:
>
>>Frankly speaking I don`t know the adequate calendar ISO norm in detail, but
>>the last days of year shouldn`t be counted as F_I_R_S_T week of that year. I
>>expected PostgreSQL rather to return 2003-53-29.
>
>
> You are mistaken.
>
> The ISO week is defined as Mon-Sun where week 1 of a year is the week
> containing the year's first Thursday. Don't ask me *why* it's defined
> that way, but it is. 2004's first Thursday is Jan 1, so that week
> extends from 2003-12-29 to 2004-01-04.
>
> regards, tom lane
>
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