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Prime time or peak time is the block of broadcast programming taking place during the middle of the evening for television programming. The term ''prime time'' is often defined in terms of a fixed time period – for example, from 19:00 to 22:00 (Central and Mountain Time) or 20:00 to 23:00 (Eastern and Pacific Time) (7 p.m. to 10 p.m. or 8 p.m. to 11 p.m.). ==Timeslot's relationship to radio and television revenue== Prime time is the daypart (a block of a day's programming schedule) with the most viewers and is generally where television networks and local stations reap much of their advertising revenues. In recent years in the US, for example, advertising expenditure during prime time was highest among drama shows.〔(Genre breakdown of primetime TV advertising expenditure in the United States in 2011 ). Nielsen. April 2012. Retrieved November 6, 2013.〕 The Nielsen ratings system is explicitly designed for the optimum measurement of audience viewership by dayparts with prime time being of most interest. Most people tend to watch television at prime time, as most often, based on standard working time, the end of the work day coincides with prime time viewing hours. Most viewers sit down to watch TV after dinner. This is usually the main reason for the high ratings for television programming at this time, as well as the attraction of the timeslot for advertisers. The existence of prime time in the United States is largely an artifact of now repealed regulations of the Federal Communications Commission, which limited the number of hours that a network can require its affiliates to broadcast. Additionally, networks may also choose to provide local affiliates the opportunity to air sporting events or other special events which may fall outside of standard designated network broadcast times. Prime time for radio is called “Drive time” and, in Eastern and Pacific Time, is 6–10 a.m. and 3–7 p.m. and, for Mountain and Central Time, is 5–9 a.m. and 2–6 p.m. A survey by Nielsen revealed that viewers watched almost two hours worth of TV during prime time.〔(How Much TV Do People Watch During the Day? ) Marketingcharts.com. April 4, 2013. Retrieved November 5, 2013.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「prime time」の詳細全文を読む スポンサード リンク
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