1 May, 15:31··
Over 300,000 Protest in France on May 1st

On May 1st, over 300,000 people demonstrated across France. A large number, 100,000, were in Paris. Smaller demonstrations occurred in cities like Toulouse, Lyon, Marseille, and Nantes. The CGT estimates were higher than official police counts.
Summarized from the sources above. Read the originals for the full story.