https://translatewiki.net/wiki/Support#[[MediaWiki:Jan/ce]]_and_[[MediaWiki:January/ce]]_45729

The short names are used almost everywhere, in all timestamps: for instance Special:Log, Special:Preferences, action=history, signatures (~~~~). I don't remember where the long names are used.

You can decide how to translate the short forms. If there is absolutely no grammatical abbreviation for names in your language (!), you can keep the long name. However, it's better if you manage to find a reasonably short size (usually 2–4 characters) which all month names can be abbreviated to.

Does this answer your question? If yes (and if people agree on my advice), we'll update the qqq.

Now we have all shown that MediaWiki:January-gen/ce there I want to make a transfer so this case but it should not check everywhere as it is now. if it is done somewhere other places tell me where?

sort of translation also need to Chechen Wikipedia

https://translatewiki.net/w/i.php?title=MediaWiki:January-gen/ce&oldid=6049956

but it should not appear anywhere

it should use this translation everywhere
MediaWiki:January/ce

Whether jan/january/january-gen is used in timestamps is defined in $dateFormats. Chechen language does not currently define those, so they are taken from the fallback, Russian: https://phabricator.wikimedia.org/diffusion/MW/browse/master/languages/messages/MessagesRu.php;215f0327fe5dc3f5e66c7acf92789e5f6be4f5d4$393

In the cryptic strings, xg means the X-gen messages if I remember correctly.

I've added some docs, please edit: https://translatewiki.net/w/i.php?title=Template:Doc-months&action=edit

I think I wrote this message correctly the point here is that https://ce.wikipedia.org/w/index.php?title=%D0%9A%D0%BE%D1%8C%D1%80%D1%82%D0%B0_%D0%B0%D0%B3%D3%80%D0%BE&action=history must show the name of the month from here MediaWiki:January/ce Now there appears these are MediaWiki:January-gen/ce. If you do not understand please tell me.
and that's what I'm asking is possible to do?

https://ce.wikipedia.org/w/index.php?title=%D0%9A%D0%BE%D1%8C%D1%80%D1%82%D0%B0_%D0%B0%D0%B3%D3%80%D0%BE&action=history
there should be shown the name of the month here MediaWiki:January/ce

So you are saying that Chechen doesn't use genitive in dates?

In most cases, genitive is not used for dates in Chechen (however, in some cases generative for months is necessary).

however, in some cases generative for months is necessary

Which cases?

https://ce.wikipedia.org/wiki/MediaWiki:Rclistfrom

That doesn't help me...

Not knowing English hard for me to explain it. But I think if you make MediaWiki:January/ce main is to solve the problem.

Well, as I understood, Umar requested about changing system messages in Chechen version—from [Month-name]-gen to simple [Month-name], because [Month-name]-gen (Genitive case) used very rarely in the Chechen language. So, after that we can save right genetive form in all -gen messages: январехь, февралехь, мартехь, апрелехь, майехь, июнехь, июлехь, августехь, сентябрехь, октябрехь, ноябрехь, декабрехь. After that, {{CURRENTMONTHGEN}} will shown as апрелехь, but in other places April still be simple апрель, without genitive ending.

Year must first be like this (2015, 18 март, 17:45)

Does the following look what you want? This is a screenshot from Special:Preferences with the proposed change.

all correct.

Change 202388 had a related patch set uploaded (by Nikerabbit):
Set time and date formats for ce

https://gerrit.wikimedia.org/r/202388

The first problem to be solved? Soul_Train explained about the problem.

Change 202388 merged by jenkins-bot:
Set time and date formats for ce

https://gerrit.wikimedia.org/r/202388

And you can do it by default? To see all the format.

Change 210888 had a related patch set uploaded (by Nikerabbit):
Set correct default date format for ce

https://gerrit.wikimedia.org/r/210888

Thank you very much. And what will happen with the Genitive case?

Change 210888 merged by jenkins-bot:
Set correct default date format for ce

https://gerrit.wikimedia.org/r/210888