The CW Television Network (most commonly referred to as The CW) is an American broadcast television network that is operated by The CW Network, LLC, a limited liability joint venture between CBS Corporation, the former owners of the United Paramount Network (UPN), and the Warner Bros. Entertainment subsidiary of Time Warner, former majority owner of The WB Television Network. The ""CW"" name is derived from the first letters of the names of these corporations (CBS and Warner Bros.).The network made its debut on September 18, 2006, after its two predecessors, UPN and The WB, respectively ceased independent operations on September 15 and September 17 of that year. The CW's first two nights of programming – on September 18 and 19, 2006 – consisted of reruns and launch-related specials. The CW marked its formal launch date on September 20, 2006, with a two-hour season premiere of America's Next Top Model. The network's programming lineup is intended to appeal to people ranging in age from 18 to 34 years. The network currently runs programming six days a week: airing Monday through Fridays in the afternoon and in primetime, along with a Saturday morning live-action educational programming block produced by Litton Entertainment called One Magnificent Morning.The CW is also available in Canada on cable, satellite and IPTV providers through stations owned-and-operated by CBS Corporation and affiliates that are located within proximity to the Canada–United States border (whose broadcasts of CW shows are subject to simultaneous substitution laws imposed by the Canadian Radio-television and Telecommunications Commission, if a Canadian network holds the broadcast rights), and through three affiliates owned by Tribune Media that are classified in that country as superstations – New York City affiliate WPIX, Los Angeles affiliate KTLA and Chicago affiliate WGN-TV.The CW is also available in Mexico through affiliates located near the Mexico–United States border (such as XETV-TDT/Tijuana-San Diego) on pay television providers. In both countries, some CW affiliates are receivable over-the-air in border areas depending on the station's signal coverage.