That made some broadcasters show high-profile events twice (live and then rebroadcast during prime time), but others withheld the same event to be broadcast solely during prime time.
For example, during the Sydney Olympics in 2000 and the Beijing Olympics in 2008, daytime events were occurring at early morning hours in the Americas, Africa, and Europe but were aired in the afternoon and evening hours live entirely in Asia, Australia, and Oceania. International tape delays of live global events, intended by major television networks, dominated world television until the early 2010s. The continents of Europe and Africa, which both fall in the same range of time zones, are receptive to each other's live telecasts, while most of Asia from India eastwards, which includes China alongside the most populous time zone in the world, also receive simultaneous live telecasts within those cluster of regions.
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In countries that span multiple time zones and are the most populous in their western or central regions, like Brazil, Russia and Indonesia, all television schedules nationwide are simultaneous with their broadcast sources, enabling full nationwide live telecasts regardless of time zones (although Russia conducts separate live primetime newscast versions for each range of time zones in that country). Australian network television schedule is largely patterned from the U.S. As a result, until today, many live programs, such as music and talent competition shows, are usually tape delayed for the western half of the country and aired as-live (although they may include edits to streamline the broadcast or resolve technical faults). Although Mexico and Canada have now regularly televised their live programs in real time simultaneously across all of their territories, in the U.S., "east" feeds usually target the Eastern and Central time zones, while "west" feeds are usually oriented towards the Pacific time zone. In countries that span multiple time zones and have influential domestic eastern regions, such as Australia, Canada, Mexico and the United States, television networks usually delay the entirety of their schedule for stations in the west, so prime time programming can be time shifted to air in local primetime hours to improve accessibility and viewership. That can also be done because of time constraints of certain portions, usually those that do not affect the outcome of the show, are edited out, or the availability of hosts or other key production staff only at certain times of the day, and it is generally applicable for cable television programs. Tape delay may also refer to the process of broadcasting an event at a later scheduled time because a scheduling conflict prevents a live telecast, or a broadcaster seeks to maximize ratings by airing an event in a certain timeslot. Considered as time shifting, that is often achieved by a "tape delay", using a video tape recorder, modern digital video recorders, or other similar technology.
Longer delays, however, may also be introduced, often to allow a show to air at the same time for the local market as is sometimes done with nationally broadcast programs in countries with multiple time zones.
In that instance, it is often referred to as a "seven-second delay" or "profanity delay". A short delay is often used to prevent profanity, bloopers, nudity, or other undesirable material from making it to air, including more mundane problems, such as technical malfunctions (an anchor's lapel microphone goes dead).
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