I'm looking for the name of a movie about a man who thinks he the only one left alive on earth, and that other people have turned and only come out at night?

The original movie that was made in 1971 is called : The Omega Man with Charleton Heston. There have been a couple of remakes since with one starring Will Smith, but the original one is the best. I think it was : I Am Legend. There is an even older one made in 1964 called : Last Man on Earth but The Omega Man was the big hit.