It could have been done. In addition the weather is good and right now and my Navigo pass covers five areas of the region.
But announcing something for the first time 22 h before, it is short. All of us do'nt spend the whole day on the Internet.
But, I think regular militants on this subject had the information through other channels.
Otherwise, on this website, you can enter a text in French and in English rather than mixing everything in the same text.
PS: I see now on your profile that you do not seem to live in Paris or even France. It can be a good excuse for late information. And so, I'll put a translation of my reply in what may be your native language.