Searched for https://fr.unesco.org/creative-cities/events/prochainement-hamamatsu-10e-concours-international-de-piano 
Note: This calendar view maps the number of captures of https://fr.unesco.org/creative-cities/events/prochainement-hamamatsu-10e-concours-international-de-piano, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.