Summary – GMT vs IST
The difference between Greenwich Mean Time (GMT) and Indian Standard Time (IST) lies in their locations, basis for calculation, and offset from Coordinated Universal Time (UTC). GMT is centered at the Prime Meridian in Greenwich, London, with a fixed UTC offset of +00:00, serving as a global timekeeping reference. IST, adopted by India, is calculated at 82.5 degrees east longitude and has a UTC offset of +05:30, making it 5 hours and 30 minutes ahead of GMT. Despite their significant role in global time standards, GMT faces challenges aligning precisely with the Sun’s zenith, while IST spans a wide geographic area, resulting in variations in sunrise and sunset times across India. Both time zones do not observe Daylight Saving Time.
Difference Between GMT And IST
Difference Between GMT And IST: GMT and IST are two distinct time zones, which are used to determine the local time at different places around the world. The time zone is a geographic region within which the same standard time is used. Greenwich Mean Time (GMT) is the time zone located at the Prime Meridian (0° longitude) in Greenwich, England. Indian Standard Time (IST) is the official time zone adopted by India. It has an offset of UTC +05:30, making it 5 hours and 30 minutes ahead of GMT. So Indian Standard Time is 5 hours and 30 minutes ahead of Greenwich Mean Time.
Table of Content
- What is GMT?
- What is IST?
- Difference Between GMT and IST
Contact Us