Convert India Standard Time (IST) to Central Time (CST/CDT), with daylight saving applied for the exact date you pick.
Tue, Oct 27
Mon, Oct 26 Previous day
| Su | Mo | Tu | We | Th | Fr | Sa |
|---|
IST 9 to 5 CDT 9 to 5
CDT is 10 hours 30 minutes behind IST.
The same conversion works for every city on these clocks, such as India to Chicago, India to Texas and Delhi to Chicago.
Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.
Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.
Shaded rows fall inside working hours in both places.
| New Delhi (IST) | Chicago (CDT) | Working hours |
|---|---|---|
| 12:00 AM | 1:30 PM previous day | |
| 1:00 AM | 2:30 PM previous day | |
| 2:00 AM | 3:30 PM previous day | |
| 3:00 AM | 4:30 PM previous day | |
| 4:00 AM | 5:30 PM previous day | |
| 5:00 AM | 6:30 PM previous day | |
| 6:00 AM | 7:30 PM previous day | |
| 7:00 AM | 8:30 PM previous day | |
| 8:00 AM | 9:30 PM previous day | |
| 9:00 AM | 10:30 PM previous day | |
| 10:00 AM | 11:30 PM previous day | |
| 11:00 AM | 12:30 AM | |
| 12:00 PM | 1:30 AM | |
| 1:00 PM | 2:30 AM | |
| 2:00 PM | 3:30 AM | |
| 3:00 PM | 4:30 AM | |
| 4:00 PM | 5:30 AM | |
| 5:00 PM | 6:30 AM | |
| 6:00 PM | 7:30 AM | |
| 7:00 PM | 8:30 AM | |
| 8:00 PM | 9:30 AM | |
| 9:00 PM | 10:30 AM | |
| 10:00 PM | 11:30 AM | |
| 11:00 PM | 12:30 PM |
Every hour of the India Standard Time day, plus the common half hours, and their CST equivalents. The second column covers the part of the year when the clocks are on a different gap.
| India Standard Time | CDT 10 h 30 min behind, most of the year (238 days in 2026) | CST 11 h 30 min behind, about 18 weeks in 2026 |
|---|---|---|
| 12:00 AM | 1:30 PM (previous day) | 12:30 PM (previous day) |
| 1:00 AM | 2:30 PM (previous day) | 1:30 PM (previous day) |
| 2:00 AM | 3:30 PM (previous day) | 2:30 PM (previous day) |
| 3:00 AM | 4:30 PM (previous day) | 3:30 PM (previous day) |
| 4:00 AM | 5:30 PM (previous day) | 4:30 PM (previous day) |
| 5:00 AM | 6:30 PM (previous day) | 5:30 PM (previous day) |
| 6:00 AM | 7:30 PM (previous day) | 6:30 PM (previous day) |
| 7:00 AM | 8:30 PM (previous day) | 7:30 PM (previous day) |
| 8:00 AM | 9:30 PM (previous day) | 8:30 PM (previous day) |
| 9:00 AM | 10:30 PM (previous day) | 9:30 PM (previous day) |
| 9:30 AM | 11:00 PM (previous day) | 10:00 PM (previous day) |
| 10:00 AM | 11:30 PM (previous day) | 10:30 PM (previous day) |
| 10:30 AM | 12:00 AM | 11:00 PM (previous day) |
| 11:00 AM | 12:30 AM | 11:30 PM (previous day) |
| 11:30 AM | 1:00 AM | 12:00 AM |
| 12:00 PM | 1:30 AM | 12:30 AM |
| 12:30 PM | 2:00 AM | 1:00 AM |
| 1:00 PM | 2:30 AM | 1:30 AM |
| 1:30 PM | 3:00 AM | 2:00 AM |
| 2:00 PM | 3:30 AM | 2:30 AM |
| 2:30 PM | 4:00 AM | 3:00 AM |
| 3:00 PM | 4:30 AM | 3:30 AM |
| 3:30 PM | 5:00 AM | 4:00 AM |
| 4:00 PM | 5:30 AM | 4:30 AM |
| 4:30 PM | 6:00 AM | 5:00 AM |
| 5:00 PM | 6:30 AM | 5:30 AM |
| 5:30 PM | 7:00 AM | 6:00 AM |
| 6:00 PM | 7:30 AM | 6:30 AM |
| 7:00 PM | 8:30 AM | 7:30 AM |
| 8:00 PM | 9:30 AM | 8:30 AM |
| 9:00 PM | 10:30 AM | 9:30 AM |
| 10:00 PM | 11:30 AM | 10:30 AM |
| 11:00 PM | 12:30 PM | 11:30 AM |
Each row is a stretch of days with one constant difference, split at every clock change.
| Dates | IST | CST | Difference |
|---|---|---|---|
| Thu, Jan 1, 2026 until Sun, Mar 8, 2026 | IST | CST | CST 11 h 30 min behind |
| Sun, Mar 8, 2026 until Sun, Nov 1, 2026 | IST | CDT | CDT 10 h 30 min behind |
| Sun, Nov 1, 2026 until Sun, Mar 14, 2027 | IST | CST | CST 11 h 30 min behind |
| Sun, Mar 14, 2027 until Sun, Nov 7, 2027 | IST | CDT | CDT 10 h 30 min behind |
| Sun, Nov 7, 2027 until Sat, Jan 1, 2028 | IST | CST | CST 11 h 30 min behind |
India Standard Time is UTC+5:30 all year. The whole country keeps a single clock, and India has not observed daylight saving time since the 1940s, so IST never changes.
IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).
Central Time follows the clock in Chicago: Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) during US daylight saving time.
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. Here CST means US Central Time (America/Chicago).
CDT is 10 hours 30 minutes behind IST for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026.
Chicago uses Central Time. CDT is 10 hours 30 minutes behind IST for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026. Type any IST time into the IST to CST converter to see the Chicago time for any date.
9:00 AM IST is 10:30 PM (previous day) CDT for most of the year (238 days in 2026). 9:00 AM IST is 9:30 PM (previous day) CST for about 18 weeks in 2026.
12:00 PM IST is 1:30 AM CDT for most of the year (238 days in 2026). 12:00 PM IST is 12:30 AM CST for about 18 weeks in 2026.
10:00 AM IST is 11:30 PM (previous day) CDT for most of the year (238 days in 2026). 10:00 AM IST is 10:30 PM (previous day) CST for about 18 weeks in 2026.
5:00 PM IST is 6:30 AM CDT for most of the year (238 days in 2026). 5:00 PM IST is 5:30 AM CST for about 18 weeks in 2026.
No, CST is behind IST. CDT is 10 hours 30 minutes behind IST for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026.
Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 4:30 PM IST, which is 6:00 AM CDT while IST and CDT apply.
Central Time changes its clocks twice a year; India Standard Time does not. The next change is on Sunday, November 1, 2026 in Central Time.
IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. Here CST means US Central Time (America/Chicago).