CST to IST time
India is 10½ hours ahead of US Central Time in summer and 11½ hours ahead in winter: 8:00 AM in Chicago is 6:30 PM in India from March to November and 7:30 PM from November to March. A Central-time evening call reaches India the next morning.
Convert the other way: IST → CST
- Difference right now
- IST 10.5 hours ahead of CST
- Shared office hours
- No weekday working hours overlap; one side has to stretch before 9:00 or after 17:00.
- Daylight saving
- Only CST shifts its clocks
CST to IST, hour by hour
Every hour of the day, using today's offsets (daylight saving is applied automatically).
- 12:00 AM10:30 AM
- 1:00 AM11:30 AM
- 2:00 AM12:30 PM
- 3:00 AM1:30 PM
- 4:00 AM2:30 PM
- 5:00 AM3:30 PM
- 6:00 AM4:30 PM
- 7:00 AM5:30 PM
- 8:00 AM6:30 PM
- 9:00 AM7:30 PM
- 10:00 AM8:30 PM
- 11:00 AM9:30 PM
- 12:00 PM10:30 PM
- 1:00 PM11:30 PM
- 2:00 PM12:30 AM+1
- 3:00 PM1:30 AM+1
- 4:00 PM2:30 AM+1
- 5:00 PM3:30 AM+1
- 6:00 PM4:30 AM+1
- 7:00 PM5:30 AM+1
- 8:00 PM6:30 AM+1
- 9:00 PM7:30 AM+1
- 10:00 PM8:30 AM+1
- 11:00 PM9:30 AM+1
Students and families in the Central zone
Indian students are the largest group of international students in the United States, and universities across the Central zone, in Texas, Illinois, Missouri and Minnesota, enroll many of them. For a student calling home, the simplest windows are early morning (7:00–9:00 AM Central, evening in India) and late evening (9:00–11:00 PM Central, morning in India). Midday in Chicago is the middle of the night in Mumbai.
Online exams, interviews and admission deadlines set in India are easy to misread from the US. A 10:00 AM IST interview is 11:30 PM Central the night before in summer and 10:30 PM the night before in winter, because the gap widens by an hour when the US returns to standard time.
Flying and planning from Chicago and Texas
Air India flies nonstop between Chicago O'Hare and Delhi, a trip of roughly 14 hours eastbound. A 9:00 PM departure from Chicago in summer lands in Delhi around 9:30 PM the following day, Indian time. From Dallas and Houston most travelers connect through Europe or the Gulf, and the time change is the same 10½ or 11½ hours on arrival.
If you plan around a family event in India, note the date: an 8:00 PM Central call on the evening before a wedding or puja reaches India on the morning of the day itself. For other zone pairs and dates, use the time zone converter.
Clock changes this year
- Mar 8, 2026CST: clocks go forward, UTC−6 → UTC−5
- Nov 1, 2026CST: clocks go back, UTC−5 → UTC−6
- —IST: no clock changes this year
Cities on these zones
Other conversions with these zones
Frequently asked questions
- What time is 8 AM Central in India?
- 6:30 PM IST in summer and 7:30 PM IST in winter.
- What is the best time to call India from Chicago?
- Early morning (7:00–9:00 AM Central) reaches India in the evening, and late evening (9:00–11:00 PM Central) reaches India the next morning.
- How long is the flight from Chicago to Delhi?
- About 14 hours nonstop eastbound and slightly longer westbound.
- Is India 10½ or 11½ hours ahead of Texas?
- 10½ hours from the second Sunday of March to the first Sunday of November, and 11½ hours the rest of the year.
- What time is midnight IST in Houston?
- 12:30 PM Central the previous day in winter and 1:30 PM the previous day in summer.