Hi Eric,

I believe you are referring to easyblog calendar module? If yes, can you check the language string below:
COM_EB_CALENDAR_HEADING_SHORT_MONTH
in your .../language/fr-FR/fr-FR.com_easyblog.ini file is it using "M Y" ?
I'm unable to check this in your current site as there is no easyblog installed yet there
Perhaps, I've misunderstood you here, can you provide us with the link to that page?

Hello,
The blog is installed (https://www.crespo.fr/idees-recettes.html)
Best regards.
Eric

Hello,
I changed to FY in COM_EB_CALENDAR_HEADING_SHORT_MONTH

COM_EB_CALENDAR_HEADING_SHORT_MONTH = "F Y"
and it works now.

Best regards.

Eric

Thanks for updating, glad that your issue is resolved now.