Speed of Darkness was created on 2011-05-31.
The Speed of Darkness - EP - was created in 2002.
Darkness is only the absence of light. The 'speed of darkness', or the speed at which darkness 'propagates' (even though only the absence of photons is propagating) is therefor equal to the speed of light.
Darkness - short stories - was created in 1985.
After Darkness was created in 1985.
She Is the Darkness was created in 1997-09.
Of Darkness... was created in 1991-02.
Darkness Descends was created on 1986-11-17.
Veil of Darkness was created in 1993.
Light in My Darkness was created in 1960.
Velvet Darkness was created in 1976.
Piercing the Darkness was created in 1988.
Summer of Darkness was created in 2004.