No primary source documents who created National Michelle Day or why it falls on October 2. It is a name-day for the given name Michelle that circulates on holiday-listing sites and socially, with no proclamation, founder, registrar, or campaign of record.
A French name crosses the Channel
Before about 1930, almost no one in the English-speaking world was named Michelle. The spread is usually credited to the French-born actress Michèle Morgan, whose fame carried the name out of France and into the Anglosphere. The name traveled with its cousins: French gave it Michele and Micheline.
Italian and Latin forms added Michela and Michaela. Short forms like Shelley and Elle followed.


