Timezone Converter

IST covers Delhi, Mumbai, Bengaluru, Hyderabad, Chennai and Kolkata. EST covers New York, Toronto, Atlanta, Miami and Boston.

Normal working days barely overlap: when one side starts, the other has finished. Calls usually mean early morning for one and evening for the other — the timeline above shows exactly how early.

The clocks do not change on the same day, so a recurring meeting can shift by an hour in March and again in November. Check any standing call in the two weeks after each change.

Eastern Time (New York) is 10.5 hours behind of India Standard Time between November and March, and 9.5 hours behind the rest of the year.

1. Take the IST time you want to convert.
2. Subtract 10.5 hours between autumn and spring, or 9.5 hours during daylight saving.
3. Roll the date forward or back if the result crosses midnight.

The gap changes because the two places start and end daylight saving on different dates — for a few weeks each spring and autumn the difference is an hour off its usual value. The converter above uses the live IANA time zone database, so it is right on those days too.

Zone details: IST is +5:30 in winter and summer (UTC), EST is −5 in winter and −4 in summer.

A working day in IST, seen from EST (during daylight saving):

Meetings usually work best where the two working days overlap. Drag the timeline above to see the overlap for any hour, or use the full time zone converter for any other pair of cities.