IST to EST
IST and EST explained
India Standard Time (IST) is UTC+5:30 all year: the whole of India has no daylight saving time. "IST" can also mean Irish Standard Time or Israel Standard Time; here it means India Standard Time.
Eastern Time uses EST (UTC−5) as standard time and EDT (UTC−4) during daylight saving time, from the second Sunday in March to the first Sunday in November; the clocks change at 2am local time. It covers the eastern US and Canada, including New York, Washington DC, Miami, Atlanta and Toronto. People often say "EST" all year, but EST is strictly the winter name: during daylight saving time the eastern US is on EDT.
The difference across the year
ET compared with IST:
- 9 hours 30 minutes behind (IST and EDT) from the second Sunday in March to the first Sunday in November
- 10 hours 30 minutes behind (IST and EST) from the first Sunday in November to the second Sunday in March
ET changes its clocks and IST doesn't, so the gap changes during the year. The converter above uses the rules for the date you pick.
Common times
| IST | ET 9 hours 30 minutes behind | ET 10 hours 30 minutes behind |
|---|---|---|
| 00:00 12am | 14:30 2:30pm, previous day | 13:30 1:30pm, previous day |
| 06:00 6am | 20:30 8:30pm, previous day | 19:30 7:30pm, previous day |
| 08:00 8am | 22:30 10:30pm, previous day | 21:30 9:30pm, previous day |
| 09:00 9am | 23:30 11:30pm, previous day | 22:30 10:30pm, previous day |
| 12:00 12pm | 02:30 2:30am | 01:30 1:30am |
| 15:00 3pm | 05:30 5:30am | 04:30 4:30am |
| 17:00 5pm | 07:30 7:30am | 06:30 6:30am |
| 18:00 6pm | 08:30 8:30am | 07:30 7:30am |
| 21:00 9pm | 11:30 11:30am | 10:30 10:30am |
How to use the converter
Pick a time and date under From; the time in ET appears under To, with your own local time underneath. The date matters around clock changes, so set it for the day you mean. ⇄ swaps the two zones, Now goes back to the current time, and either zone can be changed to any city. The planner below lines up the whole day in both places and in yours.
Handy for
- Calls between teams in India and the US east coast
- Interview and client call times for US companies
- Checking whether a US deadline falls in your night
Questions
What is the time difference between IST and EST?
ET is 9 hours 30 minutes behind IST from the second Sunday in March to the first Sunday in November, and 10 hours 30 minutes behind from the first Sunday in November to the second Sunday in March.
Do IST and ET change for daylight saving?
India Standard Time (IST) does not use daylight saving: it is UTC+5:30 all year. Eastern Time switches from EST (UTC−5) to EDT (UTC−4) on the second Sunday in March and back on the first Sunday in November.
How do I convert IST to EST?
Subtract 9 hours 30 minutes when it is IST and EDT; subtract 10 hours 30 minutes when it is IST and EST. Or use the converter above: it applies the rules for the exact date you pick.
More time zone pages
Or open the full Time Zones meeting planner and world clock.