Athnova CareIST to CST: India time vs Chicago time
India (IST, UTC+5:30) is 11 hours 30 minutes ahead of Chicago when Chicago is on CST, and 10 hours 30 minutes ahead of it during daylight saving time (CDT).
India and Chicago — US Central Time (CST/CDT).
US Central Time is used in Chicago, Dallas, Houston, Austin, Minneapolis and Winnipeg.
When the difference changes
- Clocks go back to CST on 1 November 2026 — the difference becomes 11 hours 30 minutes.
- Clocks go forward to CDT on 14 March 2027 — the difference becomes 10 hours 30 minutes.
- Clocks go back to CST on 7 November 2027 — the difference becomes 11 hours 30 minutes.
India time to CST, hour by hour
| India (IST) | Chicago (CST) | Chicago (CDT) |
|---|---|---|
| 12:00 midnight | 12:30 pm (the day before) | 1:30 pm (the day before) |
| 1:00 am | 1:30 pm (the day before) | 2:30 pm (the day before) |
| 2:00 am | 2:30 pm (the day before) | 3:30 pm (the day before) |
| 3:00 am | 3:30 pm (the day before) | 4:30 pm (the day before) |
| 4:00 am | 4:30 pm (the day before) | 5:30 pm (the day before) |
| 5:00 am | 5:30 pm (the day before) | 6:30 pm (the day before) |
| 6:00 am | 6:30 pm (the day before) | 7:30 pm (the day before) |
| 7:00 am | 7:30 pm (the day before) | 8:30 pm (the day before) |
| 8:00 am | 8:30 pm (the day before) | 9:30 pm (the day before) |
| 9:00 am | 9:30 pm (the day before) | 10:30 pm (the day before) |
| 10:00 am | 10:30 pm (the day before) | 11:30 pm (the day before) |
| 11:00 am | 11:30 pm (the day before) | 12:30 am |
| 12:00 noon | 12:30 am | 1:30 am |
| 1:00 pm | 1:30 am | 2:30 am |
| 2:00 pm | 2:30 am | 3:30 am |
| 3:00 pm | 3:30 am | 4:30 am |
| 4:00 pm | 4:30 am | 5:30 am |
| 5:00 pm | 5:30 am | 6:30 am |
| 6:00 pm | 6:30 am | 7:30 am |
| 7:00 pm | 7:30 am | 8:30 am |
| 8:00 pm | 8:30 am | 9:30 am |
| 9:00 pm | 9:30 am | 10:30 am |
| 10:00 pm | 10:30 am | 11:30 am |
| 11:00 pm | 11:30 am | 12:30 pm |
Quick conversions
- CST: 9:00 am IST = 9:30 pm (the day before) · 12:00 noon IST = 12:30 am · 6:00 pm IST = 6:30 am · 9:00 pm IST = 9:30 am
- CDT: 9:00 am IST = 10:30 pm (the day before) · 12:00 noon IST = 1:30 am · 6:00 pm IST = 7:30 am · 9:00 pm IST = 10:30 am
- CST: 9:00 am CST = 8:30 pm in India · 6:00 pm CST = 5:30 am (the next day) in India · 9:00 pm CST = 8:30 am (the next day) in India
- CDT: 9:00 am CDT = 7:30 pm in India · 6:00 pm CDT = 4:30 am (the next day) in India · 9:00 pm CDT = 7:30 am (the next day) in India
Best time to call your parents in India from Chicago
Hours when an older parent is usually up (7:00 am–9:30 pm in India) and you are not at work (before 8:30 am or after 6:00 pm on weekdays):
- CST, weekdays: 7:00 am–10:00 am in India = 7:30 pm–10:30 pm (the day before) in Chicago; 6:30 pm–8:00 pm in India = 7:00 am–8:30 am in Chicago.
- CST, weekends: 7:00 am–10:00 am in India = 7:30 pm–10:30 pm (the day before) in Chicago; 7:30 pm–9:30 pm in India = 8:00 am–10:00 am in Chicago.
- CDT, weekdays: 7:00 am–9:00 am in India = 8:30 pm–10:30 pm (the day before) in Chicago; 5:30 pm–7:00 pm in India = 7:00 am–8:30 am in Chicago.
- CDT, weekends: 7:00 am–9:00 am in India = 8:30 pm–10:30 pm (the day before) in Chicago; 6:30 pm–9:30 pm in India = 8:00 am–11:00 am in Chicago.
Put it in your calendar as a repeating call. Plan it for your own hours with the call-time planner →
Knowing they are fine when you cannot call
With Athnova Care, your parent gets one WhatsApp message a day in their language. A check-in at 9:00 am in India reaches you at 9:30 pm (the day before) CST or 10:30 pm (the day before) CDT — so on most days you know they have taken their medicines before your day starts or ends. If they do not reply, they get a reminder and then a phone call, and you are alerted. Caring for parents in India from Chicago →
Questions families ask
What is the time difference between India and Chicago?
India (IST, UTC+5:30) is 11 hours 30 minutes ahead of Chicago when Chicago is on CST, and 10 hours 30 minutes ahead of it during daylight saving time (CDT).
Is IST ahead of CST?
Yes. IST is 11 hours 30 minutes ahead of Chicago when Chicago is on CST, and 10 hours 30 minutes ahead of it during daylight saving time (CDT).
What time is it in India when it is 9 am in Chicago?
8:30 pm on CST, and 7:30 pm on CDT.
Does India have daylight saving time?
No. India keeps IST, UTC+5:30, all year, so the difference with Chicago changes only when Chicago changes its clocks.
What is the best time to call my parents in India from Chicago?
On weekdays, 7:00 am–10:00 am in India = 7:30 pm–10:30 pm (the day before) in Chicago; 6:30 pm–8:00 pm in India = 7:00 am–8:30 am in Chicago (on CST; on CDT it is 7:00 am–9:00 am in India = 8:30 pm–10:30 pm (the day before) in Chicago; 5:30 pm–7:00 pm in India = 7:00 am–8:30 am in Chicago). Most older parents are easiest to reach after breakfast and before their evening TV.