Here is a list of all of the Asian time zones that are not offset from Coordinated Universal Time (UTC) by multiples of an hour:
UTC+3:30/UTC+4:30 : Iran Standard Time/ Iran Daylight Saving Time (IRST/IRDT) in Iran
UTC+4:30 : Afghanistan Time (AFT) in Afghanistan
UTC+5:30 : Indian Standard Time (INST) in India and Sri Lanka
UTC+5:45 : Nepal Time (NPT) in Nepal
UTC+6:30 : Myanmar Time (MMT) in Myanmar
UTC+8:30 : Pyongyang Time (KPT) in North Korea
Usually an hour, though in some places it can be half an hour.
Generally there is one hour between time zones. However, in certain places this is reduced to half an hour
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.
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.
No, time zones are based on 15 degrees longitude, because there are 360 degrees of longitude on the globe and 24 hours a day, so 360/24 makes 15. But, there are 24 time zones for 25 times (-12, -11, ... -1, 0, +1, ... +11, +12) and half-hour and quarter-hour variations so it really isn't based on anything.
India, Bhutan, and Myanmar
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.
Usually an hour, though in some places it can be half an hour.
Earth Hour 2009 was carried out across 25 time zones, and involved 4000 cities in 88 countries.
It is an hour and a half north of Houston on highway 59.
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.
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!
Generally there is one hour between time zones. However, in certain places this is reduced to half an hour
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.
There is a 6 hour time difference. It is actually 7 time zones different, as some time zones are not 1 hour.
half an hour
There are 24 times zones in a day, one for each hour.