Daytime

Daytime

Daytime (/ˈdeɪtaɪm/) refers to the period of the day during which daylight is present, when the Sun is above the horizon. The exact duration and timing of daytime varies depending on the time of year and the latitude of the location.

Etymology

The term "daytime" is derived from the Old English dæg and tīma, meaning "day" and "time" respectively. It has been in use since before the 12th century.

Related Terms

• Sunrise: The time at which the upper limb of the Sun appears above the horizon in the morning.
• Sunset: The time at which the upper limb of the Sun disappears below the horizon in the evening.
• Twilight: The time between dawn and sunrise, or between sunset and dusk, during which light is visible in the sky due to atmospheric refraction and scattering.
• Nocturnal: Referring to events, activities, or organisms that are active or occur during the night, as opposed to during the daytime.
• Circadian rhythm: The internal process that regulates the sleep-wake cycle, repeating roughly every 24 hours.

See Also

• Night
• Dusk
• Dawn

External links

• Medical encyclopedia article on Daytime
• Wikipedia's article - Daytime

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