▁in ▁its ▁scheduled ▁time ▁slot ▁due ▁to ▁a ▁failure ▁in ▁communic ations ▁between ▁network ▁execut ives , ▁most ▁tele vised ▁sport ing ▁events ▁are ▁required ▁to ▁be ▁broadcast ▁until ▁their ▁completion ). ▁ ▁Local ▁new sc asts ▁or ▁synd ic ated ▁programs ▁fill ▁the ▁" prime ▁access " ▁hour ▁or ▁half - hour ▁( 7 : 0 0 ▁to ▁ 8 : 0 0   p . m . ▁in ▁the ▁Eastern ▁and ▁Pacific ▁Time ▁Z ones , ▁ 6 : 3 0 ▁to ▁ 7 : 0 0   p . m . ▁in ▁other ▁areas ), ▁and ▁lead ▁into ▁the ▁networks ' ▁prime ▁time ▁sched ules , ▁which ▁are ▁the ▁day ' s ▁most - watch ed ▁three ▁hours ▁of ▁television . ▁The ▁traditional ▁prime ▁time ▁schedule ▁runs ▁from ▁ 8 : 0 0 ▁to ▁ 1 1 : 0 0   p . m . ▁in ▁the ▁Eastern ▁and ▁Pacific ▁Time ▁Z ones ▁and ▁ 7 : 0 0 ▁to ▁ 1 0 : 0 0   p . m . ▁elsewhere , ▁although ▁this ▁var ies ▁depending ▁on ▁the ▁network ▁and ▁the ▁day : ▁the ▁four ▁major ▁networks ▁program ▁an ▁additional ▁hour ▁( running ▁from ▁ 7 : 0 0 ▁to ▁ 8 : 0 0   p . m . ▁Eastern ▁and ▁Pacific , ▁ 6 : 0 0 ▁to ▁ 7 : 0 0   p . m . ▁elsewhere ) ▁on ▁Sunday ▁even ings ▁( many ▁Spanish ▁language ▁broadcast ▁networks ▁also ▁program ▁this ▁additional ▁hour ▁to