WJMY-TV is a defunct television station based in Allen Park, Michigan assigned to channel 20 for the Detroit market following WPAG-TV going off the air in December 1957.
In 1967, WJMY-TV was awarded a construction permit for channel 20, but never made it to the air except for a brief test signal for at least two weeks in 1968, consisting merely of a card displaying its calls and city-of-license.
Finally, in November 1972 WXON purchased WJMY's construction permit and shifted to channel 20 for good.