daytimer

daytime +‎ -er

daytimer (plural daytimers)

1. (US) An AM radio station that is only allowed to broadcast during the daytime
   • 1979, United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Communications, The Communications Act of 1979: Hearings, page 339:

     And, as you know, most of the black broadcasters and Mexican-American broadcasters and minority broadcasters in the United States have wound up with the dog stations in various markets, mainly daytimers. Very few of us are in the large markets […]

• tyramide