It's Easter or "Pâques" in French. In France, only the Monday following
Easter is a public holiday. It's called "Le lundi de Pâques". So Good Friday ("le vendredi saint")
is not a public holiday in France. We wish "Joyeuses Pâques", Happy Easter, to other people.
Easter is the most important
celebration ("fête")
of Christianity ("la chrétienté"). It celebrates the resurrection of Jesus Christ. The
date changes every year.
The Easter egg ("l'oeuf de Pâques") is a gift ("le cadeau") given during
Easter.