Month abbreviation is not getting translated in Russian locale

[Rarst]

I am seeing month abbreviation not getting correctly translated for Russian locale:

var_dump( date_i18n( 'F M' ) );
// English: June Jun
// Ukrainian: Червень Чер
// Russian: Июнь Jun

Since the code executing is the same, I am assuming some issue with translation files?

Not sure if more locales are affected.

[audrasjb]

Hi,

Thanks for your ticket!

For information, I checked on translate.w.org and Jun abbreviation is actually translated in Russian locale:
​https://translate.wordpress.org/projects/wp/dev/ru/default?filters%5Bterm%5D=June&filters%5Buser_login%5D=&filters%5Bstatus%5D=current_or_waiting_or_fuzzy_or_untranslated&filter=Filter&sort%5Bby%5D=priority&sort%5Bhow%5D=desc

I will perform some tests to check if this is a Core issue.

Cheers,

Jb

[audrasjb]

I tried to reproduce it using Russian localized installation.

var_export( date_i18n( 'F M' ) );

Return: 'Июнь Июн'

So everything seems to be okay on my side.

[Rarst]

Ok, I manually wiped all Russian locale files and after re-download the issue went away. Something must have stuck in wrong state there before.

[SergeyBiryukov]

The previous language files must have been older than [34046], that would explain it.