All Time Zones – World Time Zones UTC or GMT

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Because it’s convenient for locations that communicate to keep the same time, time zones follow country and subdivision boundaries rather than longitude. From UTC−12:00 to UTC+14:00, all time zones are offsets from UTC. Most time zones are offset by a whole number of hours, but India, South Australia, and Nepal are all off by an extra 30 or 45 minutes. Some places with a higher latitude use daylight saving time for about half the year. During the spring and summer, they usually add one hour to their local time.

UTC - time zones
UTC – time zones

What is the meaning of GMT, DST, IST & UTC

  • UTC-Before 1972, this time was called Greenwich Mean Time (GMT). Now, it is called Coordinated Universal Time or Universal Time Coordinated (UTC). The Bureau International des Poids et Mesures (BIPM) is in charge of keeping track of the time scale. “Z time” or “Zulu time” are other names for it.
  • GMT-Greenwich Mean Time– Greenwich Mean Time is the average solar time at the Royal Observatory in Greenwich, London, starting at midnight. In the past, it has been calculated in different ways, such as starting at noon. Because of this, it can’t be used to give a specific time unless more information is shared.
  • DST–Daylight Saving Time – During the Sino-Indian War of 1962 and the Indo-Pakistani Wars of 1962 and 1971, DST was used for a short time.
  • IST – Indian Standard Time-Indian Standard Time is calculated on the basis of 82.5 °E longitude which is just west of the town of Mirzapur, near Allahabad in the state of Uttar Pradesh.
  • 24 Time Zones – The earth has been split into 24 zones as there are 24 hours in a day. The names of the time zones go from 0 to 23. These zones are based on the longitudes. Each time zone is 1 hour different from the next. Each zone is 15° wide (360/24=15). Canada has 5 time zones, Russia has maximum number of times zones 11, USA has 6 times zones and India has only 1 time zone.
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