Happy Birthday to Me is a Slasher Movie from 1981.Set in the prestigious Crawford Academy, the film centers around Virginia who suffered a traumatic accident on her birthday during her childhood. As another birthday is coming near, her buried memories of that fateful day have started returning little by little. But she also tends to have blackouts during these events. And some people tend to coincidentally disappear too, especially those close to her...
These are jolly good examples: