Is twilight considered Science Fiction

Twilight ZONE certainly is. I am referring to the Rod Serling (Not Sterling!) television program. it is conceivable the author may have derived his name from a popular drug store at Journal Square the Silver Rod, he inverted it To Rod Sterling- a type of Silver and then it was modified to Serling- to avoid confusion with the .925 grade silver. People used to popularly call him Rod Sterling, and it is easy to see how the Drug store legend arose. Silver Rod- backwards- also implies he may have used- Drugs.