That's "Happy Leap Day" in French, for all my non-French-speaking readers (and if I happen to actually have any French-speaking readers, I apologize in advance and blame Google Translate).
Why French? Because following long-standing Internet Tradition, today happens to be the day for celebrating the one of the greatest French characters ever created by Marvel:
50 YEARS OF LUPIN III: The Mystery of Mamo
4 hours ago