In the late 60's, WCHE 1520 West Chester PA (near Philly) and a long-dark station -- nearby WVOB in Bel Air MD -- were given some hoffific times at SSS and SRS by WKBW.
Year 'round.
I don't know how either WCHE or WVOB got licensed in the first place, except perhaps with vision no more ambitious than that of a strict daytimer -- and without a snowball's chance in Buffalo of having a solid, sensible AM or PM drive.
(Oddly, I got WVOB one bright morning near JFK Airport, on a little GE clock radio like the one atop the fridge on Happy Days. I thought the announcer said 'WVOV, Bel Air Maryland', and had to wait for some new issue of Radio-TV Experimenter to come out to clear up the matter. Semi-local WTHE from Long Island wasn't on the air yet. They often weren't, or were on late Sunday mornings. Maybe WVOB's reception was the result of some Auroral residue, hi. No 'KB at all that morning)