Hello Sylvain,
There is no banner arranged for the last day. If such is wanted such should be arranged much earlier.
I checked the CentralNotice system and it appears that the WikiFranca banner has the priority of 'normal' and the wlm banner has the priority of 'high'. If have raised the WLM banner to emergency for France now, hopefully this work. However, the situation described should not be possible as the WLM banner has a higher priority than the WikiFranca banner. Maybe this is a bug, but normally the WLM banner should be shown more often.