Superman is an imaginary character that first was seen in a comic book. He is not alive and so can not have been born anymore than the Tooth Fairy or Santa Claus.
A Man Who Was Superman was created on 2008-01-31.
Sound of Superman was created in 2005.
The Reign of the Superman was created in 1933.
Waitin' for a Superman was created in 1999.
Superman Is Dead was created in 1995.
Superman On Trial was created in 1988.
Streisand Superman was created in 1977.
Composite Superman was created in 1968.
Superman Escape was created in 2005.
Superman Supergirl was created in 1998.
Sunshine Superman was created in 1966-07.
Invisible Superman was created on 12-##-20.