nine time zones are across the united states.
how many time zones across the united states?
nine
only the full-time zone names listed below are official; abbreviations are by common use conventions, and duplicated elsewhere in the world for different time zones. view the standard time zone boundaries here.





























the united states uses nine standard time zones. as defined by u.s. law they are:





























section::::united states time zones.:zones used in the contiguous u.s..





























from east to west, the four time zones of the contiguous united states are:





























bullet::::- eastern time zone (zone r), which comprises roughly the states on the atlantic coast and the eastern two thirds of the ohio valley.
time in the united states
meanwhile, beginning 2018, the olympic games and the fifa world cup, aired currently by nbc and fox, respectively, joined the super bowl and other major domestic and international sports telecasts in airing live in all time zones across the u.s. territories. for both live telecasts, however, scheduling of such events pose special problems to networks airing due to different time zones between the u.s. and either events' hosting nation, resulting to live broadcasts occurring only during daytime or primetime per u.s. eastern time, excluding for opening and closing ceremonies, and gold medal matches, that are now routinely televised live all across the u.s. nowadays, most live shows are now being discussed openly at the same time online, as social media and television's interaction reached critical mass in the current century in relation to live television, which had gained renewed importance as being "dvr-proof" for ratings and social purposes amidst the decline of traditional television due to rise of online streaming of the majority of the recent scripted series.
effects of time zones on north american broadcasting