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  2. Zmanim - Wikipedia

    en.wikipedia.org/wiki/Zmanim

    Zmanim (Hebrew: זְמַנִּים, literally means "times", singular zman) are specific times of the day mentioned in Jewish law. These times appear in various contexts: Shabbat and Jewish holidays begin and end at specific times in the evening, while some rituals must be performed during the day or the night, or during specific hours of the ...

  3. Sunset - Wikipedia

    en.wikipedia.org/wiki/Sunset

    Sunset (or sundown) is the disappearance of the Sun at the end of the Sun path, below the horizon of the Earth (or any other astronomical object in the Solar System) due to its rotation. As viewed from everywhere on Earth, it is a phenomenon that happens approximately once every 24 hours, except in areas close to the poles .

  4. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    The times of the rising and the setting of the upper solar limb as given in astronomical almanacs correct for this by using the more general equation cos ⁡ ω ∘ = sin ⁡ a − sin ⁡ ϕ × sin ⁡ δ cos ⁡ ϕ × cos ⁡ δ {\displaystyle \cos \omega _{\circ }={\dfrac {\sin a-\sin \phi \times \sin \delta }{\cos \phi \times \cos \delta }}}

  5. Evening - Wikipedia

    en.wikipedia.org/wiki/Evening

    It generally indicates the period of time when the sun is close to the horizon and comprises the periods of civil, nautical and astronomical twilight. The exact times when evening begins and ends are subjective and depend on location and time of year. It may be used colloquially to include the last waning daytime shortly before sunset. [2]

  6. Roman timekeeping - Wikipedia

    en.wikipedia.org/wiki/Roman_timekeeping

    The Roman day starting at dawn survives today in the Spanish word siesta, literally the sixth hour of the day (sexta hora). [ 11 ] 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 ...

  7. Midnight - Wikipedia

    en.wikipedia.org/wiki/Midnight

    A clear convention may be legally defined or culturally promulgated. For example, the Hebrew calendar associates the start of a new day with sundown and midnight being a relative hour falling six hours after sundown. [6]: 25 Similarly, in traditional Arabic time at sunset, which marked the start of each new day, clocks were reset to 12:00.

  8. Twilight - Wikipedia

    en.wikipedia.org/wiki/Twilight

    Twilight occurs according to the solar elevation angle θ s, which is the position of the geometric center of the Sun relative to the horizon. There are three established and widely accepted subcategories of twilight: civil twilight (nearest the horizon), nautical twilight, and astronomical twilight (farthest from the horizon).

  9. When is Hanukkah? Here is everything you need to know about ...

    www.aol.com/hanukkah-everything-know-holiday...

    The holiday marks a time of celebration and reflection in the Jewish communities. ... Dec. 7 at sundown and ends on Friday, Dec. 15. at sundown. ... USA TODAY. Jamie Foxx reps say actor was hit in ...