for much of the day; along with educational and family-oriented programs (as well as educational-oriented networks such as Universal Kids); and Cartoon Network airs children's programming until 8 p.m. Eastern Time Zone, when the network switches to the teen- and adult-oriented block Adult Swim, from 8 p.m. to 6 a.m. Eastern Time Zone. Other channels focusing on children's programs that are available through digital cable as well as satellite television that feature animated series on weekdays include Boomerang (a spin-off of Cartoon Network, which runs primarily classic cartoons); Disney XD (which airs a mixture of cartoons and live action series); Nicktoons (a channel that is dedicated spin off from Nickelodeon, which is featuring that network's original animated programs as well as series exclusive to Nicktoons); and educational-oriented channels such as Universal Kids, Disney Junior and Nick Jr. Current Since The WB dropped its weekday block on December 30, 2005, there has not been any other major American commercial broadcast network that has aired animated series on weekdays (or children's programming for that matter, other than that was acquired by their local affiliates). PBS is the only network that still runs weekday animated series, but it is a non-commercial network. Neither The CW nor MyNetworkTV have aired (much) cartoons on weekdays – aside from early morning, or rules given from the E/I rule, or any of the Big Three television networks (ABC, NBC and CBS), most of which have opted to lease out children's programming time to other production companies. Other cable networks specializing in family-oriented and children's programming have similarly cut back on animated series on weekdays, though nowhere near the level of that done by broadcast television in the 1980s and 1990s. Even if they were to air such programming, they would have to air it at times in which children are not even awake (5 a.m.-7 a.m.), or they air it directly when they are in school in the morning (7am-9am), and only on certain channels and on local affiliates which choose to opt for cartoons; however – if they have to air regulations on children's television programming in the United States programming because of the federal government's rule on the minimal number of hours that are needed and required. Even if they were to have afternoon programming from the 3pm-5pm, or 2pm-4pm time slots, they will still need to be required to program regulations on children's television