#  Earth rotates once/24 hrs = 24 time zones around the earth.  1 hr between each time zone.  Earth rotates through 360 of longitude in 24 hours.  Rotates.

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 Earth rotates once/24 hrs = 24 time zones around the earth.  1 hr between each time zone.  Earth rotates through 360 of longitude in 24 hours.  Rotates 15 longitude in 1 hour (360/24 = 15).

 The Earth rotates from West to East (Clockwise).  East of the Prime Meridian are ahead of UT (Universal Time).  West of the Prime Meridian are behind UT.  E.G: If the sun is directly above the PM the time is 12 noon, and the local time in Berlin, Germany (one time zone east) is 1pm.

 Countries change the shape of time zones to make sure that everyone in that country is experiencing the same time.  Canada 6 time zones: Newfoundland, Atlantic, Eastern, Central, Mountain, Pacific.  Time zones are also adjusted so that they don’t pass through a city.

If you could travel around the earth (to the east) in an instant, you would cross 24 time zones. Each time you would cross a time zone, you would move your clock up one hour. When you got back to where you started, you would be one DAY ahead of everyone else!

 Distinction between days.  Runs from the North to the South pole, at 180 longitude (exactly opposite of the Prime Meridian).  It zigzags to avoid dividing land masses and Pacific Islands.  If you cross the line going east = Go back a day. (Monday to Sunday) Going west = ahead a day. (Sunday to Monday) Monday Sunday

 Countries change their time according to the season, and the sun.  Summer = daylight hours are extended into the evening when most people are awake.  First Sunday in April to last Sunday in October.  In the spring = spring AHEAD one hour.  In the fall = fall BACK one hour.

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