Calendar Girl Murders(1984)

The Fantasy Girls of the Month. Knocked off one by one... January. February. March. Poor Miss April.

During the launch party of a nude calendar, one of the models is thrown to her death by a black gloved killer. When the killer begins to strike again, going in the order of the calendar itself, a hard nosed cop realizes that he needs to solve the mystery, or risk all of the models ending up in the morgue!