TimezoneToolbox

IST to CST converter

CST is usually 10 h 30 min behind IST. It is 11 h 30 min behind IST 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.

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IST to CST table

For 5 July 2026, when CST is 10 h 30 min behind IST. Other dates: see the table on the right.

ISTCST24-hour
12:00 AM1:30 PM prev. day0:00 → 13:30
1:00 AM2:30 PM prev. day1:00 → 14:30
2:00 AM3:30 PM prev. day2:00 → 15:30
3:00 AM4:30 PM prev. day3:00 → 16:30
4:00 AM5:30 PM prev. day4:00 → 17:30
5:00 AM6:30 PM prev. day5:00 → 18:30
6:00 AM7:30 PM prev. day6:00 → 19:30
7:00 AM8:30 PM prev. day7:00 → 20:30
8:00 AM9:30 PM prev. day8:00 → 21:30
9:00 AM10:30 PM prev. day9:00 → 22:30
10:00 AM11:30 PM prev. day10:00 → 23:30
11:00 AM12:30 AM 11:00 → 0:30
12:00 PM1:30 AM 12:00 → 1:30
1:00 PM2:30 AM 13:00 → 2:30
2:00 PM3:30 AM 14:00 → 3:30
3:00 PM4:30 AM 15:00 → 4:30
4:00 PM5:30 AM 16:00 → 5:30
5:00 PM6:30 AM 17:00 → 6:30
6:00 PM7:30 AM 18:00 → 7:30
7:00 PM8:30 AM 19:00 → 8:30
8:00 PM9:30 AM 20:00 → 9:30
9:00 PM10:30 AM 21:00 → 10:30
10:00 PM11:30 AM 22:00 → 11:30
11:00 PM12:30 PM 23:00 → 12:30

When the difference changes

Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.

2026: from (UTC)until (UTC)CST vs IST
1 January 20268 March 202611 h 30 min behind
8 March 20261 November 202610 h 30 min behind
1 November 202631 December 202611 h 30 min behind
2027: from (UTC)until (UTC)CST vs IST
1 January 202714 March 202711 h 30 min behind
14 March 20277 November 202710 h 30 min behind
7 November 202731 December 202711 h 30 min behind

IST: India Standard Time · IST time now
IST can also mean Irish Standard Time or Israel Standard Time. This page means India (Asia/Kolkata), which has one zone and no daylight saving time.

CST: Central Time · CST time now
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.

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Questions

What is the time difference between IST and CST?

CST is usually 10 h 30 min behind IST. It is 11 h 30 min behind IST 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.

What is 9 am IST in CST?

9:00 am IST is 10:30 PM CST the previous day, on dates when the usual difference applies. Use the converter above for any specific date.

Which IST does this page use?

IST can also mean Irish Standard Time or Israel Standard Time. This page means India (Asia/Kolkata), which has one zone and no daylight saving time.

Which CST does this page use?

CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.