On Sat, 5 Dec 2020, at 15:00, Odne Hellebø wrote:

> But this doesn't work for months may, october, and desember
> export LANG=nn_NO.utf8
> for i in {01..12}
> do
>     mnd=$(date -d "2020-$i-01" +%B)
>     date -d "01-${mnd:0:3}-2020" +%B
> done

This is documented behaviour:
https://www.gnu.org/software/coreutils/manual/html_node/General-date-syntax.html

"""
In the current implementation, only English is supported for words and abbreviations like ‘AM’, ‘DST’, ‘EST’, ‘first’, ‘January’, ‘Sunday’, ‘tomorrow’, and ‘year’.
"""

The reason only mai / okt / des fail is that the other months match in English / Norwegian when considering the first three letters.


Cheers,
Phil

januar
februar
mars
april
mai
juni
juli
august
september
oktober
november
desember