CST to IST
CST is UTC−5 and IST is UTC+5:30 today — IST is 10½ hours ahead of CST. Abbreviations are for reading: this page resolves CST to America/Chicago and IST to Asia/Kolkata, which are the names that do not go ambiguous.
CST: US Central — China Standard Time also uses these letters. IST: India — Irish and Israel Standard Time share the letters.
The working day, side by side
The working days do not meet at all. Current abbreviations: CDT and IST.
| City | 00:00 in CST | 01:00 in CST | 02:00 in CST | 03:00 in CST | 04:00 in CST | 05:00 in CST | 06:00 in CST | 07:00 in CST | 08:00 in CST | 09:00 in CST | 10:00 in CST | 11:00 in CST | 12:00 in CST | 13:00 in CST | 14:00 in CST | 15:00 in CST | 16:00 in CST | 17:00 in CST | 18:00 in CST | 19:00 in CST | 20:00 in CST | 21:00 in CST | 22:00 in CST | 23:00 in CST |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CST—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| IST—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with CST and IST
Common questions
What is CST in IST?
IST is 10½ hours ahead of CST today: noon in CST is 22:30 in IST.
Is CST the same all year?
US Central — China Standard Time also uses these letters. An abbreviation describes an offset at a moment, not a place — the zone identifier America/Chicago is the unambiguous name.
When can CST and IST meet?
They do not overlap during working hours. 06:00–07:00 your time (17:00 there) is the cheapest compromise.