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Your question interested because as dumb as I feel, I didn't know that there was half hour time zones, so I researched it and found out why. The only way for me to explain it is to explain the purpose of time zones in the first place, and by the way I found out they are called "offset time zones" and they can be thirty minutes or even fifteen minutes. There is twenty four time zones in the world which are based on the fifteen degree increments of longitude. This is because the earth takes twenty four hours to rotate and there are 360 degrees of longitude so 360 divided by 24 equals 15. So the sun moves across 15 degrees of longitude in an hour. The offset time zones were designed to better coordinate noon as the point in the day when the sun is at its highest point in the sky, which is what our time zones revolve around... I hope this answers your question!
Reference
About.com: Geography - Offset Time Zones. http:/geography.about.com/od/culturalgeography/a/offsettimezones.htm.
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∙ 14y ago
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What time increment do you use to count Time Zones?
Usually an hour, though in some places it can be half an hour.
What is the time different between each time zone?
Generally there is one hour between time zones. However, in certain places this is reduced to half an hour
Are there 26 time zones?
Actually there are more than 24 ... some zones are a half hour off rather than a whole hour. But you need at least 24 because that's the number of hours in a day.
How many time zones do you have and how many hrs apart are they?
There are 24 time zones. Each is one hour wide.
What is the map of time zones?
The average time zone is 1 hour.
What time increment do you use to count Time Zones?
Usually an hour, though in some places it can be half an hour.
What is the time different between each time zone?
Generally there is one hour between time zones. However, in certain places this is reduced to half an hour
What is a zoning map?
It is a map showing the time zones in different parts of the world, usually when it is midday in Greenwich, from where the time zones are measured from. Most of the map is done in sections of 15°, representing one hour, although there are half hour time zones in some parts of the world.
What are 3 countries in Asia with varying time zones between half an hour?
India, Bhutan, and Myanmar
How many time zones are there between Dublin and Jakarta?
There is a 6 hour time difference. It is actually 7 time zones different, as some time zones are not 1 hour.
How many time zones are there in the west?
there are 24 time zones in the west 1 for each hour
Are there 26 time zones?
Actually there are more than 24 ... some zones are a half hour off rather than a whole hour. But you need at least 24 because that's the number of hours in a day.
How time zones in a day?
There are 24 times zones in a day, one for each hour.
How many time zones do you have and how many hrs apart are they?
There are 24 time zones. Each is one hour wide.
How can there be a half hour time difference rather than a whole hour?
Before time zones were created, each city had it's own time. A city's time depended on it's latitude. After time zones were created, they rounded the times off to the nearest hour. Some countries wanted to be more accurate and chose to round to the nearest 30 min. There are even places where time differs by 40 min!
What is the map of time zones?
The average time zone is 1 hour.
How many timezones are ther?
There are 24 major time regions. However a number of countries have local time zones that differ from the major ones by 15 minutes or a half hour.
