[mythtv-users] [mythtv] RfC: Broadcast of new TV shows on different time-zones

David Engel david at istwok.net
Sun Feb 19 19:47:37 UTC 2023

On Sun, Feb 19, 2023 at 06:54:58PM +0100, Roland Ernst wrote:
> Please help me to understand how broadcasting of new TV-Shows is handled in
> countries with multiple time-zones.
> Big companies and networks tend to place their new shows in a timely manner
> to get the best attention by the
> audience, e.g.: at prime time.
> How is this topic handled at countries like US, Canada, Mexico, Australia
> etc. where a release of a new show is
> pinned to a dedicated time-zone (i.e.: location) but broadcasted the same
> day overall in that country.
> The reason for this request for comment is that some metadata grabber
> already provide exact data, like tvmaze.py.
> The forum issue https://forum.mythtv.org/viewtopic.php?f=2&t=5301 asks
> exactly that.
> Please respond to the forum if you are already registered, otherwise post
> here.
> Especially of interest is this question: Do different networks / providers
> stick to the same rules?
> This includes different types of TV reception, like OTA, cable, satellite,
> streaming, too.

Here is my understanding for the lower 48 in the US.  I don't know
what Alaska and Hawaii do.

OTA channels usually (maybe always) adhere to their local, timezone.
For Eastern timezone, prime time is 8-11pm; Central timezone is
7-10pm; Mountain timezone is 7-10pm (I think); and Pacific timezone is
8-11pm.  Note that prime time in Eastern and Central timezones are the
same UTC.

Many national channels use Eastern/Central prime time.

Some national channels have extra, "Pacific" versions that use Pacfic
prime time.  In these cases, providers sometimes include both regular
and Pacific channels and sometimes only one version depending on their
location.  If only one version is included, the Eastern and Central
timezones get the regular version and the Pacific timezone gets the
Pacific version.  I don't know what version Mountain timezone gets in
these cases.

Finally, there are the cases of Arizona and parts of Indiana that
don't observe daylight saving time.  I don't know what they do when
DST is in effect.

David Engel
david at istwok.net

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