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Dial of a wall-mounted sundial for simultaneous display of temporal (twelve hours, black) and equinoctial (red, digit at end of hour) daytime hours (At day-night equinox, both types of hours are of equal length.) An equinoctial hour is one of the 24 equal parts of the full day (which includes daytime and nighttime).
The equinoctial hours are equal to the temporal hours at the equinoxes; the lines of both types of hours intersect. Unequal hours are the division of the daytime and the nighttime into 12 sections each, whatever the season.
The 2020 race ended into the Prime Time Access Rule hour, and the 2024 race ended in primetime hours because of cleanup related to a red flag caused by a Lap 192 crash. In 2014 and 2015, CBS moved its Thursday primetime to start at 7:30 p.m. for the first eight weeks of the season to allow for a full pregame show for Thursday Night Football , a ...
"Babylonian hours" divide the day and night into 24 equal hours, reckoned from the time of sunrise. [25] They are so named from the false belief of ancient authors that the Babylonians divided the day into 24 parts, beginning at sunrise. In fact, they divided the day into 12 parts (called kaspu or "double hours") or into 60 equal parts. [26]
When it first expanded its programming into prime time in April 1987, Fox became the first major broadcast network in the U.S. to offer a "common prime" schedule; this type of scheduling subtracts an hour from the prime time schedule, reducing it to two hours on Monday through Saturdays and three hours on Sundays – ending evening network ...
The daytime canonical hours of the Catholic Church take their names from the Roman clock: the prime, terce, sext and none occur during the first (prīma) = 6 am, third (tertia) = 9 am, sixth (sexta) = 12 pm, and ninth (nōna) = 3 pm, hours of the day. The English term noon is also derived from the ninth hour.
A plot of hours of daylight as a function of the date for changing latitudes. This plot was created using the simple sunrise equation, approximating the sun as a single point and does not take into account effects caused by the atmosphere or the diameter of the sun.
Critical hours for radio stations is the time from sunrise to two hours after sunrise, and from two hours before sunset until sunset, local time. During this time, certain American radio stations may be operating with reduced power as a result of Section 73.187 of the Federal Communications Commission 's rules.