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Earth clock

Earth clock

Overview
An Earth Clock is a computer program
Computer program
Computer programs are instructions for a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute the instructions...

 or maybe separate device that will display a map of the Earth
Earth
Earth is the third planet from the Sun. It is the fifth largest of the eight planets in the solar system, and the largest of the terrestrial planets in the Solar System in terms of diameter, mass and density...

 showing the zones where is day
Day
A day is a unit of time equivalent to approximately 24 hours. It is not an SI unit but it is accepted for use with SI. The SI unit of time is the second....

 and where is night
Night
Night or nighttime is the period of time when the sun is below the horizon. The opposite of night is day . Time of day varies based on factors such as season, latitude, longitude and timezone.-Duration and geography:Nights are shorter than days on average due to two factors...

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Encyclopedia
An Earth Clock is a computer program
Computer program
Computer programs are instructions for a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute the instructions...

 or maybe separate device that will display a map of the Earth
Earth
Earth is the third planet from the Sun. It is the fifth largest of the eight planets in the solar system, and the largest of the terrestrial planets in the Solar System in terms of diameter, mass and density...

 showing the zones where is day
Day
A day is a unit of time equivalent to approximately 24 hours. It is not an SI unit but it is accepted for use with SI. The SI unit of time is the second....

 and where is night
Night
Night or nighttime is the period of time when the sun is below the horizon. The opposite of night is day . Time of day varies based on factors such as season, latitude, longitude and timezone.-Duration and geography:Nights are shorter than days on average due to two factors...

.