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Time zones

Time zones

The Earth is divided into 24 time zones. Standard time is the time used within time zones.

Geography

Keywords

time zone, standard time, Greenwich, local time, International Date Line, UTC, Coordinated Universal Time, Earth, time difference, longitude, geography

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Scenes

The Earth

  • Prime Meridian
  • International Date Line

The Earth is divided into 24 time zones.
Time zones were defined by geometrically dividing the Earth`s equator into 24 sections bordered by meridians, each 15° of longitude apart (because the Earth rotates 15° in 1 hour). Hence adjacent time zones have a time difference of exactly 1 hour, one hour less on the west, one hour more on the east.
Standard time is the time used in time zones. The local time at the meridian in the center of each time zone is defined as the standard time.
By convention, the starting point of the time zones is the Greenwich time zone (the section between the longitudes 7.5° W and 7.5° E).
The international date line is an imaginary line connecting the North Pole and the South Pole, its path roughly follows the 180° meridian. When crossing it from east to west we advance the calendar date by one day, when we cross in the opposite direction the calendar date to the west of the line is repeated.

Standard time

  • 0
  • +1
  • +2
  • +3
  • +4
  • +5
  • +6
  • +7
  • +8
  • +9
  • +10
  • +11
  • +12
  • –11
  • –10
  • –9
  • –8
  • –7
  • –6
  • –5
  • –4
  • –3
  • –2
  • –1
  • Greenwich Mean Time

The Earth is divided into 24 time zones.
Time zones were defined by geometrically dividing the Earth`s equator into 24 sections bordered by meridians, each 15° of longitude apart (because the Earth rotates 15° in 1 hour). Hence adjacent time zones have a time difference of exactly 1 hour, one hour less on the west, one hour more on the east.
Standard time is the time used in time zones. The local time at the meridian in the center of each time zone is defined as the standard time.
By convention, the starting point of the time zones is the Greenwich time zone (the section between the longitudes 7.5° W and 7.5° E).
The international date line is an imaginary line connecting the North Pole and the South Pole, its path roughly follows the 180° meridian. When crossing it from east to west we advance the calendar date by one day, when we cross in the opposite direction the calendar date to the west of the line is repeated.

Time zone

  • Prime Meridian
  • International Date Line

The Earth is divided into 24 time zones.
Time zones were defined by geometrically dividing the Earth`s equator into 24 sections bordered by meridians, each 15° of longitude apart (because the Earth rotates 15° in 1 hour). Hence adjacent time zones have a time difference of exactly 1 hour, one hour less on the west, one hour more on the east.
Standard time is the time used in time zones. The local time at the meridian in the center of each time zone is defined as the standard time.
By convention, the starting point of the time zones is the Greenwich time zone (the section between the longitudes 7.5° W and 7.5° E).
The international date line is an imaginary line connecting the North Pole and the South Pole, its path roughly follows the 180° meridian. When crossing it from east to west we advance the calendar date by one day, when we cross in the opposite direction the calendar date to the west of the line is repeated.

Day - night

  • morning
  • noon
  • afternoon
  • midnight

The Earth is divided into 24 time zones.
Time zones were defined by geometrically dividing the Earth`s equator into 24 sections bordered by meridians, each 15° of longitude apart (because the Earth rotates 15° in 1 hour). Hence adjacent time zones have a time difference of exactly 1 hour, one hour less on the west, one hour more on the east.
Standard time is the time used in time zones. The local time at the meridian in the center of each time zone is defined as the standard time.
By convention, the starting point of the time zones is the Greenwich time zone (the section between the longitudes 7.5° W and 7.5° E).
The international date line is an imaginary line connecting the North Pole and the South Pole, its path roughly follows the 180° meridian. When crossing it from east to west we advance the calendar date by one day, when we cross in the opposite direction the calendar date to the west of the line is repeated.

Time difference

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