Let's go back exactly 65 years, to a time when commercial television in Boston was three months old. There were two stations on the air, WBZ-4 and WNAC-7. Below are the TV listings for that date, as published in that day's Boston Globe.
Although the Globe listed the programs of WBZ and WNAC separately, I have posted their listings in the more familiar format of time period, followed by programs in that time period on WBZ, then WNAC.
WBZ-TV, Channel 4 (NBC)
WNAC-TV, Channel 7 (ABC/CBS/DuMont)
10 A.M.
4-Test Pattern (until 12 Noon)
11 A.M.
7-Test Pattern)(until 12 Noon)
1 P.M.
4-Test Pattern
1:30 P.M.
7-Test Pattern
1:55 P.M.
4-Major League Baseball: New York Yankees at Boston Red Sox (according to Shrp ports.com, Boston lost 11-6 in ten innings. In retrospect, this loss may have cost Boston the American League pennant, as the team tied Cleveland at the end of the regular-season and lost a one-game playoff!)
2 P.M.
7-Natrional Tennis Championships (this was the event at Forest Hills in New York that later became the U.S. Open; according to TV listings in that day's New York Times, this event was not televised in New York City itself, so I don't know if ABC, CBS, or DuMont originated the telecast)(presumably, WNAC signed-off after the telecast ended unless it ran through 6 P.M. EDT)
5 P.M.
4-Sign-Off (time approximate after baseball)
6 P.M.
7-Small Fry Club (DuMont; hosted by Bob "Big Brother" Emery, who in 1952 returned to Boston to do a long-running local version of this show on WBZ)
6:30 P.M.
4-Test Pattern
7-Russ Hodges' Scoreboard (DuMont)
6:45 P.M.
7-Film Shorts
6:55 P.M.
4-News Tape
7:00 P.M.
4-Kartoon Korner (that's the way the Globe spelled it; this was probably also the way WBZ did)
7-News and Views (ABC evening newscast)
7:14 P.M.
4-Weather or Not with Dr. James Austin (the first on-camera TV weather forecaster in Boston; yes, the 7:14 P.M. time is not a typo!)
7:15 P.M.
7-Places, Please (short variety show) (CBS)
7:20 P.M.
4-(Shawmut) Nightly Newsteller (local newscast sponsored by the Shawmut Bank)
7:30 P.M.
4-Adventures of Rex and Rinty (presumably an episode of a movie serial; during the Summer and Fall of 1948, WBZ carried an episode of a movie serial at 7:30 P.M. each evening they were on the air; "Rinty" probably referred to Rin-Tin-Tin, who eventually would have his own hit TV series in the 1950's)
7-News (presumably, this would be "Douglas Edwards and the News" from CBS)
7:45 P.M.
7-Face The Music (not the later game show of that title, but a musical interlude from CBS; that day's Times indicated that Johnny Desmond was on that evening's show)
7:50 P.M.
4-(Camel) Newsreel Theatre-Newsreel film from either NBC or Movietone, narrated off-camera by John Cameron Swayze)
8:00 P.M.
4-Movie: The Secret Valley (according to IMDB.com, I found a 1937 movie by that title starring Richard Arlen and Virgina Grey)
7-Sportsmen's Quiz (CBS)
8:05 P.M.
7-High-School Football; Chelsea at Lynn English (in the Fall of 1948, WNAC actually televised local high-school football games, most played at the Manning Bowl in Lynn, Massachusetts. Today, regular-season high-school football in Massachusetts is televised on local cable-access channels) (WNAC signed-off after the game ended)
9:15 P.M.
4-Newsreel (maybe local; but I didn't think WBZ began shooting local news film until the early-to-mid 1950's)
9:25 P.M.
4-(Gillette) Cavalcade Of Sports (a boxing card from Madison Square Garden in New York; the feature bout was a 10-round lightweight match between Paddy DeMarco and Willie Pep; I believe Pep eventually became the world lightweight champ)
10:45 P.M.
4-(Boston Post) Views of News In New England (a young Arch MacDonald reading the news, along with still photos from the now-defunct paper; the Post had worked with WBZ in several news-related projects going back to the late 1930's on radio)
10:50 P.M.
4-Sign-Off
Although the Globe listed the programs of WBZ and WNAC separately, I have posted their listings in the more familiar format of time period, followed by programs in that time period on WBZ, then WNAC.
WBZ-TV, Channel 4 (NBC)
WNAC-TV, Channel 7 (ABC/CBS/DuMont)
10 A.M.
4-Test Pattern (until 12 Noon)
11 A.M.
7-Test Pattern)(until 12 Noon)
1 P.M.
4-Test Pattern
1:30 P.M.
7-Test Pattern
1:55 P.M.
4-Major League Baseball: New York Yankees at Boston Red Sox (according to Shrp ports.com, Boston lost 11-6 in ten innings. In retrospect, this loss may have cost Boston the American League pennant, as the team tied Cleveland at the end of the regular-season and lost a one-game playoff!)
2 P.M.
7-Natrional Tennis Championships (this was the event at Forest Hills in New York that later became the U.S. Open; according to TV listings in that day's New York Times, this event was not televised in New York City itself, so I don't know if ABC, CBS, or DuMont originated the telecast)(presumably, WNAC signed-off after the telecast ended unless it ran through 6 P.M. EDT)
5 P.M.
4-Sign-Off (time approximate after baseball)
6 P.M.
7-Small Fry Club (DuMont; hosted by Bob "Big Brother" Emery, who in 1952 returned to Boston to do a long-running local version of this show on WBZ)
6:30 P.M.
4-Test Pattern
7-Russ Hodges' Scoreboard (DuMont)
6:45 P.M.
7-Film Shorts
6:55 P.M.
4-News Tape
7:00 P.M.
4-Kartoon Korner (that's the way the Globe spelled it; this was probably also the way WBZ did)
7-News and Views (ABC evening newscast)
7:14 P.M.
4-Weather or Not with Dr. James Austin (the first on-camera TV weather forecaster in Boston; yes, the 7:14 P.M. time is not a typo!)
7:15 P.M.
7-Places, Please (short variety show) (CBS)
7:20 P.M.
4-(Shawmut) Nightly Newsteller (local newscast sponsored by the Shawmut Bank)
7:30 P.M.
4-Adventures of Rex and Rinty (presumably an episode of a movie serial; during the Summer and Fall of 1948, WBZ carried an episode of a movie serial at 7:30 P.M. each evening they were on the air; "Rinty" probably referred to Rin-Tin-Tin, who eventually would have his own hit TV series in the 1950's)
7-News (presumably, this would be "Douglas Edwards and the News" from CBS)
7:45 P.M.
7-Face The Music (not the later game show of that title, but a musical interlude from CBS; that day's Times indicated that Johnny Desmond was on that evening's show)
7:50 P.M.
4-(Camel) Newsreel Theatre-Newsreel film from either NBC or Movietone, narrated off-camera by John Cameron Swayze)
8:00 P.M.
4-Movie: The Secret Valley (according to IMDB.com, I found a 1937 movie by that title starring Richard Arlen and Virgina Grey)
7-Sportsmen's Quiz (CBS)
8:05 P.M.
7-High-School Football; Chelsea at Lynn English (in the Fall of 1948, WNAC actually televised local high-school football games, most played at the Manning Bowl in Lynn, Massachusetts. Today, regular-season high-school football in Massachusetts is televised on local cable-access channels) (WNAC signed-off after the game ended)
9:15 P.M.
4-Newsreel (maybe local; but I didn't think WBZ began shooting local news film until the early-to-mid 1950's)
9:25 P.M.
4-(Gillette) Cavalcade Of Sports (a boxing card from Madison Square Garden in New York; the feature bout was a 10-round lightweight match between Paddy DeMarco and Willie Pep; I believe Pep eventually became the world lightweight champ)
10:45 P.M.
4-(Boston Post) Views of News In New England (a young Arch MacDonald reading the news, along with still photos from the now-defunct paper; the Post had worked with WBZ in several news-related projects going back to the late 1930's on radio)
10:50 P.M.
4-Sign-Off