Today, July 14th, is Paris Festival. In French, it is called "14 juillet" (Quatos Juillet), and it is the anniversary of the French Revolution and the founding of the country, so it is an important day for Monsieur as well.
At today's military parade on the Champs-Élysées, it seems that anyone watching will be required to have a health pass (vaccinated or negative test result within the last 48 hours) and wear a mask.