Dates in spanish App Engine Standard PHP 5.5

[Ignacio Cuppi]

Hello

In my environment (App Engine Standard PHP 5.5) I have a problem with the language of the dates. I need to show them in Spanish, but I can not make it work.
In my local environment it is translated without problems, but in production it shows the dates in English.

In my php.ini I already put this:

date.timezone = "America / Argentina / Cordoba"
extension = "intl.so"

And in the code where I need to show the dates in Spanish I tried this:

setlocale (LC_TIME, 'es_AR.UTF-8', 'es_AR', 'es-AR');
echo strftime ("% d of% B", strtotime ($ event_date));

and in this way also:

setlocale (LC_TIME, 'es_ES.UTF-8', 'es_ES', 'es-ES');
echo strftime ("% d of% B", strtotime ($ event_date));

Am I doing something the wrong way?

Thank you very much

[Kenworth (Google Cloud Platform)]

AFAIK there is no space between the % and the character (%d not % d). Here is the official documentation for strftime().

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[Ignacio Cuppi]

There is no such space in my code. This text editor must have added it.
Ok, I'm going to ask the same question in StackOverflow

Thank you