➦In 1943...WNYC-FM call letters debut.
WNYC began regularly scheduled broadcasts on the FM band on March 13, 1943 at 43.9 megacycles. Known originally as W39NY, the FM outlet adopted its present WNYC-FM call letters and its present frequency of 93.9 MHz within a few years.
➦In 1948..."Life With Luigi" debuted on the CBS Radio Network. It continued to March 3, 1953.
➦In 1965..KYW 1060 AM in Philadelphia flipped to an all-news format.
KYW began in 1921 in Chicago, Illinois. It was jointly owned by Westinghouse Electric Corporation and Commonwealth Edison. Westinghouse later bought out ComEd's share and became sole owner of the station.
In 1927, Westinghouse aligned its four radio stations (KYW, KDKA in Pittsburgh, WBZ in Boston and WBZA in Springfield, Massachusetts) with the NBC Blue Network, which originated from former sister station WJZ (the present-day WABC) in New York City. Westinghouse had been a founding partner of the Radio Corporation of America (RCA), NBC's original parent company.
On September 21, 1965, shortly after Westinghouse regained control of 1060 AM, the newly rechristened KYW once again dropped its NBC radio affiliation and was converted into one of the first all-news stations in the country. Newsman Steve Porter read the first newscast. It had been edited by Fred B. Walters, the former Harrisburg bureau chief and eventual Executive Editor.
Five months earlier Westinghouse Broadcasting converted 1010WINS, KYW's New York sister station since 1962, from a Top-40 format to all-news. A similar move was made three years later at another Westinghouse-owned station, KFWB in Los Angeles. KYW has been one of the highest-rated radio stations in the country since that point and has been the market leader in Philadelphia for much of that time. The Westinghouse all-news trio, meanwhile, revolutionized and defined the all-news format. KYW's early format elements were shared with WINS, such as the distinctive teletype sound effect playing in the background, and the slogans "All News, All the Time", "The Newswatch Never Stops", "Listen 2, 3, 4 Times a Day" and "You Give Us 22 Minutes, We'll Give You the World".

KYW's present format runs on a 30-minute cycle. Regular segments include contains traffic and mass transit reports from Metro Traffic every ten minutes on the "twos" (six times an hour), sports updates every quarter-hour (twice an hour, at :15 and :45), weather reports as much as six times an hour (four regularly scheduled reports at :07, :14, :37 and :44 past every hour with breaking weather news plus special forecasts for the New Jersey Shore and the Poconos), and business news from Bloomberg twice an hour (at :25 and :55). When breaking news warrants, KYW will break format to provide continuous coverage of any event.