(Cleveland) - Mayor Frank Jackson has proclaimed Thursday as “Superman Day” in the City of Cleveland. 

He presented a proclamation to the Siegel and Shuster Society marking the 75th anniversary of Superman's 1938 appearance on the cover of DC's "Action Comics" No. 1.

Glenville area residents Jerry Siegel and Joe Shuster created the comic book hero during the Great Depression.

(Photo by Ken Robinson/WTAM 1100)

To commemorate the event, a Superman flag was raised on the steps of City Hall with Superman in attendance; lights on City Hall and the Terminal Tower will be blue, red, and yellow. 

Cleveland-Hopkins International Airport offered cupcakes for travelers and a birthday card for the hero at its recently-installed Superman Exhibit.

Residents (and fans of Superman near and far) are encouraged to send in their best Superman-poses via twitter #SuperCle. 

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