| City | Country | Time Zone | Offset from IST | IST Relation |
|---|
IST is 10 hours 30 minutes ahead of Eastern Standard Time (EST). When it is 12:00 PM IST, it is 1:30 AM EST the same day. During EDT (summer), the difference reduces to 9 hours 30 minutes.
IST is UTC+5:30, meaning India is 5 hours and 30 minutes ahead of GMT/UTC. When it is 12:00 PM GMT, it is 5:30 PM IST. India does not observe Daylight Saving Time.
IST is 1 hour 30 minutes ahead of Dubai (GST, UTC+4). When it is 12:00 PM IST, it is 10:30 AM in Dubai. This is the most searched conversion among the Indian diaspora in the Gulf.
Singapore (SGT) is 2 hours 30 minutes ahead of IST. When it is 12:00 PM IST, it is 2:30 PM in Singapore. Singapore does not observe daylight saving time.
IST is 5 hours 30 minutes ahead of GMT (London in winter). During British Summer Time (BST, March–October), IST is 4 hours 30 minutes ahead of London time.
IST is 13 hours 30 minutes ahead of Pacific Standard Time (PST). During PDT (summer), the gap is 12 hours 30 minutes. A meeting at 9 AM PST is 10:30 PM IST the same night.
India uses a single time zone based on the 82°30′E meridian passing through Mirzapur, UP — exactly 5 hours 30 minutes east of Greenwich. The half-hour offset was set in 1906 by the British as a compromise between Bombay Time and Calcutta Time.
No. India has never observed Daylight Saving Time (DST). IST remains UTC+5:30 throughout the year. This makes India-to-world conversions change seasonally only when the other country observes DST (e.g., UK, USA).