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Why do we have time zones?	The Earth turns, so the sun is high at different times in different places		geo-time-zones
How many degrees of longitude is one time zone, roughly?	15 degrees		geo-time-zones
How many hours does the Earth take to turn once?	24 hours		geo-time-zones
What line is zero degrees longitude?	The Prime Meridian		geo-time-zones
Which city does the Prime Meridian run through?	Greenwich, London (England)		geo-time-zones
What does UTC stand for?	Coordinated Universal Time (The standard time all zones are measured from)		geo-time-zones
What is GMT?	Greenwich Mean Time, the time at the Prime Meridian		geo-time-zones
Which line is roughly where one calendar day changes to the next?	The International Date Line		geo-time-zones
Where is the International Date Line in the Earth?	About 180 degrees longitude, in the Pacific Ocean		geo-time-zones
If you cross the Date Line going west, what happens to the date?	It moves forward one day		geo-time-zones
If you cross the Date Line going east, what happens to the date?	It moves back one day		geo-time-zones
Which way does the sun seem to move across the sky?	East to west		geo-time-zones
If it is noon in New York, is it earlier or later in Los Angeles?	Earlier, because Los Angeles is further west (9 a.m.)		geo-time-zones
Name the four main U.S. time zones in the lower 48 states.	Eastern, Central, Mountain and Pacific		geo-time-zones
Which U.S. time zone is farthest east in the lower 48?	Eastern Time		geo-time-zones
Which U.S. time zone is farthest west in the lower 48?	Pacific Time		geo-time-zones
Which zone is New York City in?	Eastern Time		geo-time-zones
Which zone is Chicago in?	Central Time		geo-time-zones
Which zone is Denver in?	Mountain Time		geo-time-zones
Which zone is Los Angeles in?	Pacific Time		geo-time-zones
Which zone is Alaska mostly in?	Alaska Time		geo-time-zones
Which zone is Hawaii in?	Hawaii–Aleutian Time		geo-time-zones
How many hours apart are Eastern and Pacific Time?	Three hours		geo-time-zones
What is Daylight Saving Time?	Moving clocks ahead an hour in spring and back in fall to use more daylight		geo-time-zones
Which U.S. state mostly does not use daylight saving time?	Arizona (except the Navajo Nation) (Hawaii also does not use it)		geo-time-zones
What does a.m. mean?	Ante meridiem: before noon		geo-time-zones
What does p.m. mean?	Post meridiem: after noon		geo-time-zones
What time zone is London in during winter?	GMT (UTC+0)		geo-time-zones
Which time zone is Tokyo, Japan in?	Japan Standard Time (UTC+9)		geo-time-zones
Which time zone is India in?	India Standard Time (UTC+5:30)		geo-time-zones
Which time zone is Beijing, China in?	China Standard Time (UTC+8) (China uses one time zone for the whole country)		geo-time-zones
Which country has the most time zones, counting overseas territories?	France		geo-time-zones
Which large country spans eleven time zones?	Russia		geo-time-zones
Which zone is Paris in during winter?	Central European Time (UTC+1)		geo-time-zones
Which zone is Sydney, Australia on the east coast in?	Australian Eastern Standard Time (UTC+10)		geo-time-zones
What does it mean when a place is 'ahead' of us in time zones?	It is further east, and its clock shows a later time		geo-time-zones
At which time is the sun directly overhead, on average?	Around noon (solar noon)		geo-time-zones