How time zones work, the International Date Line, and the UTC offset for major world cities.
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- What is a time zone?
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A region where everyone uses the same standard time.- What does UTC stand for?
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Coordinated Universal Time.- How many standard time zones exist globally?
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24, one for each hour of the day.- What is the International Date Line?
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An imaginary line at approximately 180 degrees longitude where the calendar date changes.- When traveling west across the International Date Line, the date does what?
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Advances one day forward.- When traveling east across the International Date Line, the date does what?
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Goes back one day.- What is GMT?
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Greenwich Mean Time, equivalent to UTC.- If it is noon UTC, what time is it in UTC+3?
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3:00 PM.- If it is noon UTC, what time is it in UTC-5?
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7:00 AM.- If it is noon UTC, what time is it in UTC+8?
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8:00 PM.- If it is 6:00 PM UTC, what time is it in UTC+9?
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3:00 AM the next day.- How many hours ahead is UTC+12 compared to UTC+0?
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12 hours.- How many hours behind is UTC-8 compared to UTC+0?
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8 hours.- How many hours apart are UTC+5 and UTC-3?
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8 hours.- How many degrees of longitude represent one hour of time?
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15 degrees.
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