IST to CST Converter
Central Time is on daylight saving time: CDT (UTC−5) until Sun, Nov 1.
Mexico City and Saskatchewan stay on CST (UTC−6).
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
5:30 pm17:30 IST (UTC+5:30), Oct 17, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 17, 2026
IST is 10 hours and 30 minutes ahead of CDT.
IST and CST (US winter time, UTC-6) examples
These examples always use IST (UTC+5:30) and CST (UTC-6). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IST is 11 hours and 30 minutes ahead of CST.
CST is US Central winter time (early November to mid-March). The rest of the year Chicago uses CDT (UTC-5), one hour later. For Central Time that follows daylight saving time, use IST to CT. For daylight-time examples, use IST to CDT.
How the time difference changes
For most of the year, IST is 10 hours and 30 minutes ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, IST is 11 hours and 30 minutes ahead of CST.
For most of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 10:30 pm (previous day) to 7:30 am in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 9:30 pm (previous day) to 6:30 am in CST.For most of the year, working hours of 09:00 to 18:00 in IST correspond to 22:30 (previous day) to 07:30 in CDT. At other times of the year, working hours of 09:00 to 18:00 in IST correspond to 21:30 (previous day) to 06:30 in CST.
Compare IST time with CST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
India Standard Time is 10 hours and 30 minutes ahead of Central Daylight Time.
5:30 pm17:30 in IST is 7:00 am07:00 in CDT
IST to CDT call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in IST which corresponds to 8am-9am08:00-09:00 in CDT. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
5:30 pm17:30 IST / 7:00 am07:00 CDT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| IST | CDT |
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India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
Current time in India: India time now
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Belize, Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, United States
Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Puebla, Santiago de Querétaro.
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
Today the lighter areas are on UTC−5 (Central Daylight Time).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).
End: Central Standard Time (CST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Central Standard Time (CST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
See USA daylight saving time and upcoming clock changes worldwide.
CST representations, usage and related time zones
- -06 - basic short
- -0600 - basic
- -06:00 - extended
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
- Sierra - Military abbreviation for CST
- S - short form of 'Sierra'
- America/Bahia_Banderas
- America/Belize
- America/Chicago
- America/Chihuahua
- America/Costa_Rica
- America/El_Salvador
- America/Guatemala
- America/Indiana/Knox
- America/Indiana/Tell_City
- America/Knox_IN
- America/Managua
- America/Matamoros
- America/Menominee
- America/Merida
- America/Mexico_City
- America/Monterrey
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Ojinaga
- America/Rainy_River
- America/Rankin_Inlet
- America/Regina
- America/Resolute
- America/Swift_Current
- America/Tegucigalpa
- America/Winnipeg
- CST6CDT
- Canada/Central
- Canada/Saskatchewan
- Mexico/General
- US/Central
- US/Indiana-Starke
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone