The real birthday, I believe, is the 5th, but the celebration was changed to Saturday because Monday is a holiday ("Whit Monday," the day after Pentecost . . . also known as "Lundi de Pentecôte"). When I saw Marius earlier today, he reported not feeling well the past few days, but said that he has gotten some medicine that is helping him to feel better . . . and he expects to be in good form for Saturday.