Today is my Fête!
No, not my Birthday, that is two months away. In France you have your birthday and the day of your namesake. And the 19th of September is the fête de Sainte Émilie de Rodat who in 1815 formed a foundation young women, girls with dificulties and prosoners or war. She was also a mystic.
So if in France somone wishes you “Jouyeuse fête” and it isn’t your birthday: It is the feast day of your saint.