Here are the television listings for NBC's experimental station W2XBS in New York City, published in The New York Times during June 1941. This was the last month in which the station was experimental. Commercial broadcasting began on July 1st and with it the station became WNBT. Although there's no way of knowing based on listings alone, I would imagine there was some sort of promotional effort on the part of the station regarding the switch to commercial broadcasting.
Monday, June 2nd, 1941 [1]
8-9PM - Test Pattern
9PM - Amateur Boxing Bouts at Jamaica ArenaWednesday, June 4th, 1941 [2]
1-2:15PM - Test Pattern
2:15PM - Racing: Belmont ParkSaturday, June 7th, 1941 [3]
1-2PM - Test Pattern
2PM - ICAAAA Track and Field Meet, Randall's IslandMonday, June 9th, 1941 [4]
2PM - Racing at Aqueduct
8-9PM - Test Pattern.Wednesday, June 11th, 1941 [5]
7:45-8:45PM - Test Pattern
8:45PM - Baseball: Dodgers vs. Pirates, Ebbets FieldMonday, June 16th, 1941 [6]
8-9PM - Test Pattern
9PM - Boxing: Jamaica ArenaThursday, June 19th, 1941 [7]
2:30-3:30PM - Test Pattern
3:30-4:30PM - Swimming Demonstration, Astoria Pool.Saturday, June 21st, 1941 [8]
1-2:15PM - Test Pattern
2:15PM - Racing; Aqueduct TrackMonday, June 30th, 1941 [9]
8-9PM - Test Pattern
9-11:30PM - Amateur Boxing Bouts at Jamaica Arena
Works Cited:
1 "Radio Today." New York Times. 2 June 1941: 32.
2 "Radio Today." New York Times. 4 June 1941: 44.
3 "Radio Today." New York Times. 7 June 1941: C30.
4 "Radio Today." New York Times. 9 June 1941: 36.
5 "Radio Today." New York Times. 11 June 1941: 42.
6 "Radio Today." New York Times. 16 June 1941: 30.
7 "Radio Today." New York Times. 19 June 1941: 44.
8 "Radio Today." New York Times. 21 June 1941: 30.
9 "Radio Today." New York Times. 30 June 1941: 32.
The "remote" broadcasts the station scheduled at night were soon augmented by the return of in-studio programming, when "W2XBS" became "WNBT" on July 1, 1941.