prime time       
noun [ U ] uk/ˈpraɪm ˌtaɪm/ us/ˈpraɪm ˌtaɪm/
 (广播与电视的)黄金时间
in television and radio broadcasting, the time when the largest number of people are watching or listening
  The interview will be broadcast during prime time. 这次采访将在黄金时间播出。 
 prime-time TV 电视黄金档