India Standard Time
IST means UTC+05:30 throughout the year.
Other meanings: Israel Standard Time · Irish Standard Time.
TIME ZONE CONVERTER
IST to CST
Time Converter
Convert India Standard Time to Central Standard Time. Compare dates, seasonal differences and meeting hours.
IST is 11h 30m ahead of CST in 2026.
9 AM IST = 9:30 PM CST Tue, 3 Nov at the destination
Selected date: November 4, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVIST to CST conversion table
November 4, 2026 · Date changes are marked.
View the full 24-hour table
| IST | CST |
|---|---|
| 12:00 AM | 12:30 PM -1 day |
| 1:00 AM | 1:30 PM -1 day |
| 2:00 AM | 2:30 PM -1 day |
| 3:00 AM | 3:30 PM -1 day |
| 4:00 AM | 4:30 PM -1 day |
| 5:00 AM | 5:30 PM -1 day |
| 6:00 AM | 6:30 PM -1 day |
| 7:00 AM | 7:30 PM -1 day |
| 8:00 AM | 8:30 PM -1 day |
| 9:00 AM | 9:30 PM -1 day |
| 10:00 AM | 10:30 PM -1 day |
| 11:00 AM | 11:30 PM -1 day |
| IST | CST |
|---|---|
| 12:00 PM | 12:30 AM |
| 1:00 PM | 1:30 AM |
| 2:00 PM | 2:30 AM |
| 3:00 PM | 3:30 AM |
| 4:00 PM | 4:30 AM |
| 5:00 PM | 5:30 AM |
| 6:00 PM | 6:30 AM |
| 7:00 PM | 7:30 AM |
| 8:00 PM | 8:30 AM |
| 9:00 PM | 9:30 AM |
| 10:00 PM | 10:30 AM |
| 11:00 PM | 11:30 AM |
Starting with the CST working day
These examples start on 2026-11-04 in CST.
09:00 CST20:30 →IST · 2026-11-04
17:00 CST04:30 →IST · 2026-11-05
Which time-zone meaning are we using?
Central Standard Time
CST means UTC−06:00 throughout the year. Central Time follows regional clock rules and uses UTC−06:00 on your selected date.
Use CT for local civil time →Other meanings: China Standard Time.
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 IST to CST throughout 2026
09:00 in IST converts to 21:30 in CST on every date in 2026. The destination is on the previous calendar day.
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does IST time become a different date in CST?
Your complete source day: 2026-11-04. Each range shows which destination date to use.
IST · 2026-11-0400:00–11:30UTC+05:30
CST · 2026-11-0312:30–24:00UTC−06:00 Previous day
IST · 2026-11-0411:30–24:00UTC+05:30
CST · 2026-11-0400:00–12:30UTC−06:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026Some things stay in sync.
The difference between IST and CST stays the same throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−11h 30m
Neither selected clock changes its UTC offset during 2026.
CLOCK CHANGES
No upcoming clock adjustment
Both selected labels are fixed offsets, so seasonal clock changes do not alter this conversion.
PLAN BEYOND A SINGLE DAY
Daily CSVIST–CST working hours through 2026
Every date calculated with your working windows. 261 selected IST workdays; public holidays are not applied.
Least shared time0h
Most common0h
Most shared time0h
Days without a 60-min slot261 / 261
One fixed start time does not fit every working day.
Your working windows never overlap on the selected host workdays this year. Adjust working days, hours or duration above, or use different seasonal meeting times.
IST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. CST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
IST to CST: useful answers
Is CST the same as local city time?
CST is fixed at UTC−06:00. IST to Chicago (CT) uses regional rules instead. On 2026-11-04, 09:00 at the source becomes 21:30 at the destination (CST). Choose the local-city option above when that is the clock you mean.
Which cities match CST throughout 2026?
Mexico City, Mexico; Guatemala City, Guatemala; Managua, Nicaragua; Tegucigalpa, Honduras keep the same UTC−06:00 offset as fixed CST throughout 2026 under the published rules. Matching an offset does not mean every place uses the abbreviation CST.
Does the IST–CST time difference change in 2026?
The difference stays constant throughout 2026: CST is 11h 30m behind compared with IST.
Does this conversion change the calendar date?
09:00 in IST on 2026-11-04 is 21:30 in CST on 2026-11-03. Use the destination date when adding the meeting to a calendar.
Can IST and CST meet during working hours?
Your selected working windows have no shared time on 2026-11-04. The planner shows alternatives and how many minutes fall outside each person's working hours. Try another date or adjust the windows.
Related time-zone meanings and conversions
Choose the question you need answered
9 PM IST to CSTExact answer, date rollover and seasonal context12 PM IST to CSTExact answer, date rollover and seasonal context5:30 PM IST to CSTExact answer, date rollover and seasonal context8 PM IST to CSTExact answer, date rollover and seasonal context11:30 PM IST to CSTExact answer, date rollover and seasonal context10 PM IST to CSTExact answer, date rollover and seasonal context8 AM IST to CSTExact answer, date rollover and seasonal context10 AM IST to CSTExact answer, date rollover and seasonal context
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Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology