September Concert to Remember 9/11 Victims and Celebrate Sister Cities Program - Clearwater This past Thursday, Sept 11th, the City of Clearwater joined communities around the world from Beijing, China to New York City as they filled the skies with the universal language of music in The September Concert The September Concert is a series of free musical performances held in cities around the world on Sept 11th every year. The concerts offer a way for communities to commemorate this historic date and focus on bringing all people together, reaffirming our hope for world peace and celebrating life and universal humanity.