IST to CST Caribbean Converter
CST is not used on this date.
This converter uses CDT (UTC−4), as in Havana.
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 28, 2026 = 8:00 am08:00 CDT (UTC-4), Oct 28, 2026
IST is 9 hours and 30 minutes ahead of CDT.
IST and CST examples
These examples always use IST (UTC+5:30) and CST (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IST is 10 hours and 30 minutes ahead of CST.
How the time difference changes
For most of the year, IST is 9 hours and 30 minutes ahead of CDT Caribbean. From Nov 1, 2026 to Mar 14, 2027, IST is 10 hours and 30 minutes ahead of CST Caribbean.
For most of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 11:30 pm (previous day) to 8:30 am in CDT Caribbean. At other times 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 CST Caribbean.For most of the year, working hours of 09:00 to 18:00 in IST correspond to 23:30 (previous day) to 08:30 in CDT Caribbean. At other times of the year, working hours of 09:00 to 18:00 in IST correspond to 22:30 (previous day) to 07:30 in CST Caribbean.
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 9 hours and 30 minutes ahead of Cuba Daylight Time.
5:30 pm17:30 in IST is 8:00 am08:00 in CDT
IST to CDT call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in IST which corresponds to 8:30am-9:30am08:30-09:30 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
8:00 am08:00 Cuba Daylight Time (CDT). Offset UTC -4:00 hours
5:30 pm17:30 IST / 8:00 am08:00 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
Cuba Standard Time
Offset: CST is 5 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Cuba
Principal Cities: The largest city in the CST time zone is Havana in Cuba, with about 2.164 million people. Other major cities in this time zone include Santiago de Cuba, Camagüey, Holguín, Guantánamo.
Today the shaded areas are on UTC−4 (Cuba 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 Cuba Daylight Time (CDT).
End: Cuba Standard Time (CST) ended on Sunday, March 8, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 1:00 am01:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Cuba Standard Time (CST) starts on Sunday, November 1, 2026 at 1:00 am01:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 12:00 am00:00. Standard time starts annually on the first Sunday of November.
See Cuba daylight saving time and upcoming clock changes worldwide.
CST representations, usage and related time zones
- -05 - basic short
- -0500 - basic
- -05:00 - extended
- -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
- Romeo - Military abbreviation for CST
- R - short form of 'Romeo'
- America/Havana
- Cuba
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- CDT - Central Daylight Time
- EST - Eastern Standard Time
- ET - Eastern Time
- COT - Colombia Time
- CST - Cuba Standard Time
- EASST - Easter Island Summer Time
- ECT - Ecuador Time
- PET - Peru Time
- R - Romeo Time Zone